Regulations Supported
Road Transport laws define maximum weights that a truck may carry, depending on number of axles, axle spacing, the tyre footprint of those axles, etc. In addition, there are limits to vehicle length, rear overhang, etc. Limits vary significantly from one jurisdiction to another.
TruckScience maintains a library of up-to-date regulations. Click the map to see if your jurisdiction and specific regulation is supported.
Latest Updates
The Quebec regulations have been updated with changes that took affect on January 1st, 2026. The classification of axles and vehicles have been updated with an entirely new classification numbering system created. Other more nuanced changes have been added as well such as a re-definition of wide base tires and extra weight given to snowplows. Additionally, under Chapter V of the re-written regulations, there are a number of combinations that are able to operate until the end of 2029 on ‘transitional’ rules. These include the most commonly operated B-Train combinations, which are limited to an overall length of 25m, and various twin steered vehicles and pony or full trailer combinations, specifically V.13,14,16,17,18,39 and 40. These rules now are available in the app as a separate Quebec ‘transitional’ regulation. Read more…
The New South Wales Class 3 Zero Emission Vehicle Mass and Dimension Exemption Notice 2026 (C2026G00296) allows for qualifying electric and hydrogen fuel cell vehicles to exceed some mass limits. Qualifying vehicle combinations include a rigid truck or prime mover with or without a semitrailer or a B-double. Mass increases on the front axle are substantial, with a front axle permissible of 8,000 kgs and a rear axles permissible of 18,500 kgs. Trailer axles are governed by typical limits and the vehicles are excempt from regular mass limits and axle spacing limts. There are a number of conditions that must be met in order to attain the higher limits, including minimum axle spacings both between axles and between axle groups. Warnings are provided in the app when these conditions are not being met. The notice expires on 26 May 2031. Read more…
Arkansas Code – Title 27 – Transportation; Subtitle 3 – Motor Vehicles and Their Equipment; Chapter 35 – Size and Load Regulations, subdivision (g)(1)(B) or subdivision (g)(1)(C). This variance applies to vehicles or vehicle combinations with 5 axles and hauling Livestock or Poultry, and Solid Waste Vehicles
The Arkansas regulations have been reviewed and updated with two exemption regulations added to TruckScience, the 8 Percent Exemption for Livestock Poutry and Solid Waste Vehicles, as well as the Exemption for 5 Axle Aggregate Vehicles hauling hauling sand, gravel, rock, or crushed stone. The 8 percent exemption allows for tandem weights to 36,500 lbs and an increase of 8% on all other bridge weights, to a maximum of 80,000 lbs. The Aggregate Vehicle Exemption allows for qualifying vehicles to not have to follow bridge grouping restrictions, but no other weight increases are specified. Also, since we last reviewed the Arkansas regulations the height restriction for vehicles has been specified at 14′. Read more…
Modern emergency vehicles are packed with life-saving equipment, heavy ladders, and massive water tanks. To accommodate this, federal law provides specialized weight allowances that go beyond standard interstate limits. Under 23 U.S.C. § 127(r), a State must allow emergency vehicles to operate on the Interstate System up to a Gross Vehicle Weight of 86,000 lbs, with specific axle limits of:
– Single Steering Axle: 24,000 lbs
– Single Drive Axle: 33,500 lbs
– Tandem Axle: 62,000 lbs
– Tandem Rear Drive Steer Axle: 52,000 lbs
What Qualifies as an “Emergency Vehicle”? The law isn’t just for standard fire trucks. According to the legal definition in § 127(r)(2), an emergency vehicle is any vehicle designed to be used under emergency conditions to: Transport personnel and equipment. Support emergency operations, such as fire suppression or mitigating hazardous situations. Read more…
Indiana Regulations have been improved and now include the grandfathered regulations as a part of the Interstate and State regulations. If the outer bridge of the vehicle or vehicle combination has a bridge limit over 73,280 lbs then the federal bridge formula is applied, if it is under, then the state limits are applied which are limited by the sum of axles. State, Heavy Duty Road, and Toll road regulations are also included. State rules include the aforementioned federal and grandfathered weights, the garbage truck axle weight increase exemption, and the kingpin to rear axles limit. Read more…
South Dakota Codifed Laws: Chapter 32-22 – Weight, Size and Load Restrictions. South Dakota Spring Load Restrictions
South Dakota has some complications around tire width limits per inch of tire width. Numerous excemptions allowing for 600 lbs of weight per inch of tire width, including on trailers being pulled by trucks with a GVWR of 11,000 lbs or less, wide base tires (on interstate and some selected routes), 4 tired axles and steer axles. Other axle configurations are limited to 500 lbs per inch of tire width. South Dakota also has relatively long vehicles allowed under regular divisible limits and has the distinction of not having an upper limit on state roads for an overall gross limit, vehicles are limited by the bridge formula. Also, 8, 7, and 6 ton axle load restrictions have also been included in the app. Read more…
North Dakota Century Code; Title 39 – Motor Vehicles: Chapter 39-12 – Size, Width, and Height Restrictions; and the North Dakota Administrative Code; Title 37 – Department of Transportation; Article 37-06 – Multiple Vehicle Combinations
North Dakota includes a number of weight increases over federal limits and have seasonal load restrictions that are implemented during the springtime. Axle weights are similar to Federal weights but axle groups of 3 or more axles are limited to 48,000 lbs, regardless of axle spread. Also, on state roads axles over 8′ apart are considered to be two separate axles and get single axle weights. The state gross weight limit is 105,500 lbs based on the state bridge formula, which is an extension of the Federal bridge formula. Three Seasonal Restrictions are available in the app, at the 8 ton, 7 ton and 6 ton levels, which restrict vehicles to lower axle weights, and sometimes lower gross weights. Also 10% increase in weights over regular weight restrictions for Farm and Solid waste vehicles which is listed in the regulations has been added to the app as a separate regulation. Read more…
National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257)
National Class 3 Truck and Dog Trailer Mass Exemption Notice 2023 (No.1) (C2023G01213)
Alaska Administrative Code – Title 17 – Transportation and Public Facilities, Chapter 25 – Operations, Wheeled Vehicles. (Seasonal) Weight Restriction Information Bulletin – Published by the Alaska DOT.
Utah Code: Title 72 – Transportation Code, Chapter 7 – Protection of Highways Act, Part 4 – Vehicle Size, Weight, and Load Limitations and Utah Administrative Code: R909-2. Utah Size and Weight Rule.
Louisiana Revised Statutes – Title 32, Sections 380 to 387: Motor Vehicles and Traffic Regulation; Subpart A. Size, Width, Height, Length, Weight and Load of Vehicles in Regular Operation
The Louisiana state regulations have been added and a number of differences can be highlighted. There are increased gross weights available for vehicle combinations with a tridum or quadrum axle group, with an interstate limit of 83,400 lbs and a non-interstate limit of 88,000 lbs. Additionally bridge laws are not applicable on the non-interstate highways. There is a limit of 42,000 lbs for tridum groups and 50,000 lbs for quadrum groups. Off the interstate, these axle limits are increased by 2,000 lbs for single axles and 3,000 lbs for all other axle groups.
Dimensional differences include a 14′ height limit off the interstate and a 59’6″ semi trailer length both on and off the interstate. Double trailers are not allowed on non-interstate highways.
Louisiana has a number of special permits available for increased weights based on commodities like agricultural goods (sugar cane, cotton), containerized goods, solid waste, waste vehicles, etc. These have not been added to the regulations. Read more…
New Mexico Statutes: Chapter 66 – Motor Vehicles, Article 7 – Traffic Laws; Signs, Signals and Markings; Accidents; Weight and Size; Traffic Safety, Part 5 – Weight and Size Limitations
Nebraska Revised Statues §§60-6,288 et seq. to §§60-6,305
Nebraska has recently updated the single vehicle limit to 45′ from 40′ this has been updated. The requirement for liftable axles to carry at least 8,000 lbs or 8% of the gross weight of the vehicle combination or lose that axle’s contribution to the overall bridge formula calculation has also been added to the regulations.
Additionally, state roads have been added which have a overall gross limit of 95,000 lbs, and do not include exceptions for battery electric and natural gas vehicles. Read more…
Maine Revised Statute Title 29-A, Chapter 21
Watch out for using additional axles, they only count toward the gross weight calculation if they are carrying 50% of their allowable maximum. The operation of a 3 axle truck and 2 axle trailer can under very specific axle configurations attain a maximum weight of 94,000 lbs. Also commodity exceptions exist which allow for higher axle weights and an increase in gross weight limits of 10% over normal state limits. Read more…
Alabama State Regulations have been added which have several key differences and exceptions from the Alabama Interstate Regulations. The first is a bridge table which has 36,000 lbs tandem axle weights, and generally higher weights at some of the longer axle to axle distances. We have also added the ‘Special Trucks’ exemption, which allows for trucks and trucks with semi trailers that have tank or dump bodies to operate without conforming to inner bridge limits.
Additionally, Alabama specifies weight exception for Natural Gas vehicles with slightly different wording than other jurisdictions, no specific default weight increase is listed, only that the increase should correspond with the increased weight of this natural gas system over a diesel system. Read more…
Tenn. Code Ann. Title 55, Chapter 7 Size, Weight and Load
Tennessee regulations have been reviewed and a couple of minor differences on state roads uncovered and added to the Tennessee state regulations. These include that Battery Electric and Natural Gas vehicles do not receive the Federal increase of 2,000 lbs, and that double trailers are not allowed. Read more…
Oklahoma Statute Title 47 Motor Vehicles
There are several notable differences from Oklahoma regulations for the Oklahoma Interstate and National Network Roads. Firstly is an increase in the permissible gross weight to 90,000 lbs. Semi Trailers are limited to 53′ on state roads, whereas on Interstates in Oklahoma they are limited to 59’6″. Also, utility or refuse collection vehicles can exceed the standard bridge formula on state roads by 15%. This has been implemented in the app for rigid vehicles when adding a garbage truck body.
Kansas Statute – Chapter 8, Article 19 – Uniform Act Regulating Traffic; Size, Weight and Load of Vehicles
Revised Statutes of Missouri: Title XIX Motor Vehicles, Watercraft and Aviation
Code of Massachusetts Regulations: 700 CMR 7.00: Use of the Massachusetts Turnpike and The Metropolitan Highway System.
Massachusetts regulations have been improved, with a note added that warns about the necessity of adding a sticker indicating the actual height of the vehicle or trailer. Also, the restriction on truck and trailer combinations has been incorporated into the regulations; Massachusetts does not allow trailers with a registered weight above 5,000 lbs. Some of these trailers can be allowed to operate with a reducible load permit. Note that this weight restriction does not apply to semi trailers.
The reducible permit regulation has been included as a separate regulation. When applying this regulation, a note is displayed which outlines whether the truck combination likely qualifies for the permit or not. If the general permit conditions are not met then regular Massachusetts limits are applied.
The Turnpike and Metropolitan Highways system limits have also been included. They have similar limits to the reducible permits. Exceeding weight limits may be possible under a different special permit. Typical federal weight limits can also be used on the Turnpike, but as the gross weight limits are almost always greater than the Turnpike limits, they are not included in this regulation. There may be permits available for higher masses. Federal Bridge Laws are also valid on the turnpike, which are not incorporated into these regulations.
Wyoming Statutes, Title 31 – Motor Vehicles, Chapter 18 – Commercial Vehicles, Article 8 – Size and Weight Limits. Table 2 Weight Limits
Wyoming regulations have been updated and improved. Table 2 weights, which can apply to Primary and Secondary Roads in Wyoming have been added as an additional regulation. An interesting consideration within Wyoming is that on Primary or Secondary roads, the operator of the vehicle can decide whether to comply with Table 1 (Federal Bridge to 117,000 lbs) or Table 2 (State Bridge restricting gross based on first to last axle distance).
Additionally, if a vehicle combination has a distance of less than 22′ between tandem groups, then the vehicle cannot use Table 2 weights. In this case, the regulation will return a gross combination maximum of 0 lbs and a tip will be displayed to explain why this has occurred.
A new check which has been updated in both Wyoming Federal and State regulations which checks that the second trailer cannot be greater than 5,000 lbs heavier than the first trailer in a combination with two trailers.
North Carolina General Statutes, Chapter 20-115 et seq
The North Carolina Federal regulations have been reviewed and updated and North Carolina State regulations have been added. Updates to the Federal regulations include the increase of the vehicle height maximum in North Carolina from 13’6″ to 14′. Also, a tip has been added for the federal and state regulations for dump bodies.
The regulations ( Section 20-116 g(2)) specify that vehicles or trailers carrying rock, gravel, stone, or any other similar substance cannot be loaded unless: “The height of the load against all four walls does not extend above a horizontal line six inches below their tops when loaded at the loading point”. A tip explaining this has been added to all dump bodies.
For the state level regulations two new rules have been incorporated. First, the restriction on double trailers has been described. Secondly, a rear axle increase to 23,500 lbs per axle has been incorporated for garbage trucks.
General Statutes of Connecticut: Title 14, Chapter 248 Vehicle Highway Use
Connecticut State regulations have been added to the list of regulations. There are now 2 additional regulations, one that applies on United States and Connecticut routes numbered from 1 to 399, inclusive, 450, 476, 508, 693 and 695; and another that applies on state roads not included in this list (unspecified routes).
Connecticut regulations which apply on the interstate already have some significant deviations from US Federal regulations with 36,000 lbs tandem axles, and 22,400 lbs single axle maximums for those axles greater than 6′ from one another.
The state rules include these differences, as well as axle and gross increases for electric vehicles and rear axle increases for refuse vehicles. There are also additional restrictions like double trailer combinations not being allowed and a maximum semi trailer length of 48′ off of specified routes.
Minnesota (MN) State 10T Overweight
This regulation reflects the increased bridge weights over 80,000 lbs in the MN Statue 169.824, which require a permit to operate.
Minnesota (MN) State 10T Winter Weights
This regulation reflects the 10% weight increase that is applicable under winter weights, which is also used for selected commodities (harvest, milk single units). Check with Minnesota authorities for detail on when and where this weight increase can be used.
Minnesota (MN) State 9 Ton Routes
Limits on routes marked as 9 ton routes. These involve axle weight limit modifications which are different from federal limits.
Minnesota (MN) State 7 Ton Routes
Limits on routes marked as 7 ton routes. These involve axle weight limit modifications which are different from federal limits.
Minnesota (MN) State Unpaved Routes Seasonal Restriction
Limits on unpaved routes during seasonal weight restrictions. These involve axle weight limits to 5 tons (2,000 lbs), and reduced bridge limits on non-overall bridge groups.
Kentucky State
The weight and dimension rules in Kentucky are defined in two separate regulation sections:
603 KAR 5:066 Weight (mass) limits for trucks and 603 KAR 5:070 Motor vehicle dimension limits
603 KAR 5:070 Motor vehicle dimension limits
Each of these parts of the regulations reference a different road classification. That is why there are at least 4 different classifications in Kentucky and TruckScience has added 3 of them.
Interstate and National Network – Have increased dimensions ‘STAA’ truck sizes, and federal bridge laws apply, as they do in all Kentucky jurisdictions. A tridem axle group can go to 48,000 lbs if the gross weight of the vehicle or combination is less than or equal to 73,280 lbs.
Non-National Network ‘AAA’ Highways – These roads have an 80,000 lbs gross weight but do not have the increased dimensions provided by federal law, which means a maximum width of 8’ and a maximum combination length of 65’.
‘AA’ Highways – These roads have state dimension limits and a maximum gross weight of 62,000 lbs.
‘A’ Highways – These roads have not been included in the app, they have the same weight and dimension limits as ‘AA’ Highways but a gross maximum weight of 44,000 lbs. These are much smaller highways in the state which are not likely to be heavily used by heavy trucks.
New Hampshire State
We have added 2 new regulations for New Hampshire that correspond to Sections 266:18-a and 266:18-b. Both these sections are applied on the Non-Interstate and General Highway System. The latter allows for the ability to operate with gross weights up to 99,000 lbs for vehicle combinations with 6 or more axles. Both regulations also specify increases masses for 4 axle straight trucks, which generally operate as a 6X4 with 2 drive axles and an additional pusher or tag axle.
Another thing to watch out for is the inclusion of tag (or trailing axles) under the additional registration regulations. If your tag axle is not carrying at least 50% of the weight it is allowed to, the vehicle’s 4th axle does not count towards the gross weight limit.
There are a number of axle weight differences from federal regulations, for single axles 18,000 lbs or 22,400 lbs depending on spacing from adjacent axles. Tandem axles often can scale out at 36,000 lbs, and under certain circumstances at 40,000 lbs, or even 44,800 lbs!
A dump semi-trailer also has exceptions from the state bridge weight restrictions and can achieve the 99,000 lbs gross with an inner bridge (drives to trailer axles) distance of 28 feet.
New Zealand Tow Coupling Restriction
A new check on Tow Coupling position was added. Now TruckScience will check if the vehicle tow coupling is compliant with the New Zealand Regulations.
| Tow coupling position (for towing heavy trailer) | |
| Full trailer | 45% of wheelbase of towing vehicle |
| Simple trailer | At least 700 mm rearward of the rear axis of the towing vehicle and not more than a distance equal to 50% of wheelbase |
Adding a new separate Payload Height Maximum to Maine regulations
In the US state of Maine, there are specific regulations on height restrictions. It describes a prohibition of vehicles operating that have a “permanent or temporary structural part more than 13 feet, 6 inches in height.” However, the payload on that vehicle may extend 6 inches higher than 13’6”, to 14 feet.
Now, payload on a vehicle or trailer will be measured separately in the state of Maine and being over height will only be flagged if the vehicle, body or equipment is higher than 13’6”, but payload will be flagged as over height only above 14’.
Queensland Zero Emissions Heavy Vehicle Permit
This scheme requires a number of safety features that must be selected before the increased masses are applied. A number of notes guide the user to the appropriate configuration. After all conditions are fulfilled, the appropriate axle and gross mass ratings are applied.
Review and Improvement of the Western Australian Regulations
Our Western Australia regulations were reviewed and greatly improved. A number of deficiencies were noticed over the years and correct which included:
- The removal of Concessional and Higher Mass Limits which don’t apply in Western Australia
- Removal of axle spacing limits for B Doubles
- Improvement of mass limits for front axles based on tyre width as per the regulations
- Addition of Towed Vehicle Ratio rule for small vehicles
More detail on the Towed Vehicle Ratio
There is a requirement in the WA regulations for a light trailer (under 4500 kgs) to be limited to 1.5 times the tare weight of the towing vehicle, or the same weight if there is no braking system.
We have assumed that all trailers do have braking systems and a warning is displayed to the user that their trailer is too heavy in relation to their braking system.
Australian Performance Based Standards Level 1 and 2
This is a very common way for vehicles to achieve higher masses in Australia and we have added restrictions that are associated with combinations that the app supports for PBS Level 1 and 2.
| PBS Truck and Dog Trailer #1. |
| PBS Truck and Dog Trailer #2. |
| PBS Truck and Dog Trailer #3. |
| PBS Truck and Dog Trailer #4. |
| PBS Truck and Dog Trailer #5. |
| PBS Truck and Dog Trailer #6. |
| PBS Truck and Dog Trailer #7. |
| PBS Truck and Dog Trailer #8. |
| PBS Prime Mover and Semitrailer #9. |
| PBS Prime Mover and Semitrailer #10. |
| PBS Prime Mover and Semitrailer #11. |
| PBS Prime Mover and Semitrailer #12. |
| PBS Prime Mover and Semitrailer #13. |
| PBS Prime Mover and Semitrailer #14. |
| PBS B-Doubles #17. |
| PBS B-Doubles #18. |
| PBS B-Doubles #19. |
| PBS B-Doubles #20. |
| PBS B-Doubles #21. |
| PBS Truck and Pig Trailer #31. |
| PBS Truck and Pig Trailer #32. |
Note that some of the PBS combinations are available in PBS Level 1 and 2, while others are available only in Level 1, and yet others are available only in Level 2. If the configuration qualifies for a different PBS configuration, a note is shown to inform the user. Like the below example of a 3 axle truck and 5 axle dog trailer, which is only available for PBS level 2. Because PBS Level 1 is selected, a tip is displayed for the user.
Western Australian Accredited Mass Management Scheme (AMMS)
The Western Australian Accredited Mass Management Scheme (AMMS) is a comprehensive scheme used in Western Australia that provides mass increases for specified combinations. There are 3 Levels of mass increases which can be obtained, they are listed the list of regulations. When a vehicle combination is selected, a tip is shown displaying the category of the combination in the program and to remind users that an additional permit must be obtained. As well, the increased masses are automatically applied.
| Category 2C – B-double |
| Category 3B – B-double Tri Drive Prime Mover |
| Category 2A – Prime Mover and Semi Trailer |
| Category 1A – Prime Mover and Semi Trailer |
| Category 1A – Tri Drive Prime Mover and Semi Trailer |
South Australia Electric Exemption
The South Australia “Low and zero emission heavy vehicle trial scheme” is less comprehensive than similar schemes in other parts of Australia. Notably it is only open to prime movers in specific combinations, rigid vehicles are not eligible for mass increases under this scheme.
The scheme has additional requirements for vehicles to qualify including road friendly suspension, rollover protection, front underrun protection, the vehicle is required to comply with ADR 35/07 for Anti-Lock Braking Systems and the trailer is required to meet ADR 35/04, and a requirement for Indirect vision devices that comply with ADR 14/03 or later.
Improving Height Restrictions in Australia for Cattle Carrier Bodies
Previously the app checked only the overall height of the combination against the legal maximum height. Now, we have introduced new rules that check the height of each vehicle or trailer separately if there is a reason to do so. For the National regulations in Australia, maximum height is 4.3 m, but this can be 4.6 meters if the vehicle or trailer is a cattle carrier. This height restriction is now checked individually in each case and the 4.6 meter height restriction is given if the truck or trailer has a cattle carrier body.
New South Wales Electric Exemption
New South Wales has an exemption scheme which like other similar schemes in Queensland and South Australia provides for higher axle and gross masses for rigid vehicles, and prime movers with a semi trailer or in a B-double configuration. Notable exceptions include an 8,000 kg front axle and 18,500 kg tandem drive limits.
ADR 80/04 Axle Mass Increase to Australian Queensland / National
A new regulation has taken effect in Australia and TruckScience has implemented these changes into the app. Australian Design Rule 80/04 defines a type of Euro 6 vehicle as meeting a higher emissions standard, and meeting this high standard for many types of engines means a 500 kg mass increase on the vehicle steering axle. This higher standard also includes Battery Electric and Hydrogen Fuel cell vehicles so these vehicles will also qualify as a ‘EURO 6’ vehicle as defined in the ADR.
If the vehicle’s engine is marked as meeting the standards of ADR 80/04, or if it has a Battery Electric or Hydrogen Fuel Cell Energy source, the appropriate additional mass will be applied.
There is another Australian regulation which grants an extra 500 kgs on the front axle and here is how the two requirements now function in TruckScience:
| Is the vehicle a ‘Complying Steer Axle Vehicle’? (Front Underrun and Rollover Protections and other req.) | No | No | Yes | Yes |
| Is the vehicle a ‘EURO6 Vehicle’ as defined in ADR 80/04? | No | Yes | No | Yes |
| Front Tyre width over 315 mm | – | – | – | Yes |
| Front Axle Increase | 0 | 500 kgs | 500 kgs | 1000 kgs |
Improving the Ontario Gross Weight Calculation
We have improved how we calculate the maximum gross weight in Ontario, Canada. Ontario regulations are unique in that the total gross weight maximum of a combination is often calculated as the actual weight on the front axle plus the sum of the other axle maximums. This leads to a situation where most people expect the maximum gross weight restriction to be the sum of all axle maximums, but there are situations where this isn’t the case.
Previously, TruckScience displayed the regulatory maximum but often this caused confusion. So now, the maximum gross weight calculation in TruckScience has been updated to display the expected sum of axle maximums as a gross weight restriction, and only when the specific (and relatively rare) situation of a gross weight that exceeds the actual front axle weight plus other axle maximums will the gross weight maximum change to the legal maximum which is being calculated in the background.
A good example of this is a truck designated as schedule 23, where the commonly understood maximum weight allowed is about 36,000 kgs.
But in this situation where the actual weight on front axle plus other axle maximums are exceeded, but the gross weight changes to the true legal maximum to ensure full compliance with these complicated regulations.
Warning about potential compliance issue with Australian regulations regarding 50mm ball couplings
The Vehicle Standards Guide 16 (VSG-16) published by the National Heavy Vehicle Regulator in Australia regulates the size of a trailer that can be attached to a 50mm ball coupling hitch mounted on a vehicle over 5000 kg GVM. The issue being that larger vehicles with this coupling designed primarily for smaller vehicles cannot safely tow trailers over a certain size.
That size is calculated according to a formula specified within VSG-16 based on the GVM of the vehicle. Now, this formula is calculated within TruckScience and a tip is displayed warning the user about the potential compliance issue if the truck and trailer masses would result in non-compliance with VSG-16.
Improving Queensland Regulations
The Australian National regulations have been improved, which several small corrections addressed.
- Concessional Mass limits have been improved at the National Level. Previously some axle mass restrictions were not included (like concessional mass limits for 6-tyred tandems). These are now included in the National regulations.
- Concessional Mass Limits concerning overall gross mass maximums have been corrected to correctly display a maximum of 1 or 2 tons above the General Mass Limits. B Doubles correctly get 1 or 2 tons more depending on whether their General Mass Limit is greater than 55 tons.
- The 3 Axle Truck and 4 axle Dog trailer Notice which is integrated into the Australian National Regulations has been improved and now supports high bin/low bin differences.
- A restriction that was previously not applied, a maximum mass of 15 tons for heavy vehicles with interaxle distances less than 2500mm.
Regulations Directory
TruckScience maintains a library of up-to-date truck size and weight regulations.
The following is a list of jurisdictions for which TruckScience can verify if your configurations comply.
United States
Alabama
Alabama (AL) - State Highways State Highways Code of Alabama - Title 32 - Chapter 9 Last reviewed: November 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Alaska
Alaska (AK) - Seasonal Weight Restriction 50% National Highway System (NHS) routes (Seasonal) Weight Restriction Information Bulletin - Published by the Alaska DOT Last Reviewed: January 2026
Alaska (AK) - Seasonal Weight Restriction 75% National Highway System (NHS) routes (Seasonal) Weight Restriction Information Bulletin - Published by the Alaska DOT Last Reviewed: January 2026
Alaska (AK) - Seasonal Weight Restriction 85% National Highway System (NHS) routes (Seasonal) Weight Restriction Information Bulletin - Published by the Alaska DOT Last Reviewed: January 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Arizona
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Arkansas
Arkansas (AR) - Exemption 8 Percent Variance Non-Interstate Highways Arkansas Code - Title 27 – Transportation; Subtitle 3 - Motor Vehicles and Their Equipment; Chapter 35 - Size and Load Regulations, subdivision (g)(1)(B) or subdivision (g)(1)(C). This variance applies to vehicles or vehicle combinations with 5 axles and hauling Livestock or Poultry, and Solid Waste Vehicles Last reviewed: May 2026
Arkansas (AR) - Exemption Aggregates Non-Interstate Highways Arkansas Code - Title 27 – Transportation; Subtitle 3 - Motor Vehicles and Their Equipment; Chapter 35 - Size and Load Regulations, subdivision (h)(1) and (2). Truck Tractors and a single semi-trailer do not have to follow bridge restrictions if hauling hauling sand, gravel, rock, or crushed stone Last reviewed: May 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
California
California (CA) - State Roads Black Routes California Law Vehicle Code § 35000 et. Seq Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Colorado
Colorado (CO) - State Roads Non-Interstates Colorado Revised Statutes, Title 42, Vehicles and Traffic Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Connecticut
Connecticut (CT) - State Roads United States and Connecticut routes numbered from 1 to 399, inclusive, 450, 476, 508, 693 and 695 General Statutes of Connecticut: Title 14, Chapter 248 Vehicle Highway Use Last reviewed: August 2025
Connecticut (CT) - State Unspecified Routes Routes other than the Interstate, National Network, and United States and other Connecticut routes General Statutes of Connecticut: Title 14, Chapter 248 Vehicle Highway Use Last reviewed: August 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Delaware
Delaware (DE) - State Roads Non-Interstates and Non-US Numbered Routes Delaware Code: Title 21, Motor Vehicles, Operation and Equipment, Chapter 45. Size and Weight of Vehicles and Loads Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
District of Columbia
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Florida
Florida (FL) - State Roads Non-Interstate Florida Statutes: Title XXIII Motor Vehicles, Chapter 316 Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Georgia
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Hawaii
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Idaho
Idaho (ID) - Permit 105,500 lbs National Network and Designated State Routes Idaho Statutes: Title 49 Motor Vehicles, Chapter 10 Weight, Speed and Tire Regulations Last reviewed: April 2024
Idaho (ID) - State Roads Non-National Network Idaho Statutes: Title 49 Motor Vehicles, Chapter 10 Weight, Speed and Tire Regulations Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Illinois
Illinois (IL) - State Roads Non-Designated Highways Illinois Compiled Statues - Chapter 625 §§5/15-101 et seq Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Indiana
Indiana (IN) - State Roads State Highways not Designated as Heavy Duty or Toll Highways Indiana Code – Title 9, Article 20 – Size and Weight Regulation Last reviewed: March 2026
Indiana (IN) - Heavy Duty Roads Heavy Duty Highways Indiana Code – Title 9, Article 20 – Size and Weight Regulation Last reviewed: March 2026
Indiana (IN) - Toll Road Indiana Toll Road Indiana Code – Title 9, Article 20 – Size and Weight Regulation Last reviewed: March 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Iowa
Iowa (IA) - State Roads Non-Primary Roads and Weight Limits for 6 and 7 Axle Combinations on Non-Interstate Primary Roads Iowa Code Chapter 321 - Motor Vehicles and Law of the Road Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Kansas
Kansas (KS) - State State Highways Kansas Statute - Chapter 8, Article 19 - Uniform Act Regulating Traffic; Size, Weight and Load of Vehicles Last reviewed: September 2025
Kansas (KS) - Agricultural Permit State State Highways Kansas Statute - Chapter 8, Article 19 - Uniform Act Regulating Traffic; Size, Weight and Load of Vehicles Last reviewed: September 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Kentucky
Kentucky (KY) - State 'AA' Highways 'AA' Highways Kentucky Administrative Regulations 603 KAR 5:066 and 603 KAR 5:070 Last reviewed: May 2025
Kentucky (KY) - State 'AAA' Highways Non-National Network 'AAA' Highways Kentucky Administrative Regulations 603 KAR 5:066 and 603 KAR 5:070 Last reviewed: May 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Louisiana
Louisiana (LA) - State Roads Non-Interstate Highways Louisiana Revised Statutes - Title 32, Sections 380 to 387: Motor Vehicles and Traffic Regulation; Subpart A. Size, Width, Height, Length, Weight and Load of Vehicles in Regular Operation Last reviewed: January 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Maine
Maine (ME) State Roads Non-Interstate and Maine Turnpike Maine Revised Statute Title 29-A, Chapter 21 Last reviewed: December 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Maryland
Maryland (MD) State Roads Non-Designated State Highways 2023 Maryland Statutes - Transportation - Title 24 - Vehicle Laws: Size, Weight, and Load; Highway Preservation - Subtitle 1 - Size, Weight, and Load Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Massachusetts
Massachusetts (MA) - Reducible Load Permit State Listed in Attachment A of 700 CMR 8.00 Code of Massachusetts Regulations: 700 CMR 7.00: Use of the Massachusetts Turnpike and The Metropolitan Highway System. There may be permits available for higher masses. Federal Bridge Laws are also valid on the turnpike, which are not incorporated into these regulations Last reviewed: August 2025
Massachusetts (MA) - Turnpike & Metropolitan Massachusetts Turnpike and Metropolitan Highway System Code of Massachusetts Regulations: 700 CMR 7.00: Use of the Massachusetts Turnpike and The Metropolitan Highway System. There may be permits available for higher masses. Federal Bridge Laws are also valid on the turnpike, which are not incorporated into these regulations Last reviewed: August 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Michigan
Michigan (MI) - State Rules Interstate and Designated Michigan Complied Laws Section 257 Last reviewed: April 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Minnesota
Minnesota (MN) - State 10T Overweight 10 Ton Paved State Routes This regulation reflects the increased bridge weights over 80,000 lbs in the MN Statue 169.824, which require a permit to operate. Note that the actual gross weight is limited on the permit itself Last reviewed: June 2025
Minnesota (MN) - State 7 Ton Routes 7 Ton Routes Limits on routes marked as 7 ton routes. These involve axle weight limit modifications which are different from federal limits Last reviewed: June 2025
Minnesota (MN) - State 9 Ton Routes 9 Ton Routes Limits on routes marked as 9 ton routes. These involve axle weight limit modifications which are different from federal limits Last reviewed: June 2025
Minnesota (MN) - Seasonal Restric State Unpaved Unpaved routes under seasonal restrictions Limits on unpaved routes during seasonal weight restrictions. These involve axle weight limits to 5 tons (2,000 lbs), and reduced bridge limits on non-overall bridge groups Last reviewed: June 2025
Minnesota (MN) - Winter Weights State 10T 10 Ton Roads and specified by MN Authorities This regulation reflects the 10% weight increase that is applicable under winter weights, which is also used for selected commodities (harvest, milk single units). Check with Minnesota authorities for detail on when and where this weight increase can be used Last reviewed: June 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Mississippi
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Missouri
Missouri (MO) - State Other State Highways Revised Statutes of Missouri: Title XIX Motor Vehicles, Watercraft and Aviation Last reviewed: September 2025
Missouri (MO) - State Commercial Zones Commercial Zones as defined in MO Statues §304.190 Revised Statutes of Missouri: Title XIX Motor Vehicles, Watercraft and Aviation Last reviewed: September 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Montana
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Nebraska
Nebraska (NE) - State Roads Non-Interstate and Non-National Network Highways Nebraska Revised Statues §§60-6,288 et seq. to §§60-6,305 Last reviewed: January 2026
Nebraska (NE) - Permit 95,000 lbs Interstate Highways Nebraska Revised Statues §§60-6,288 et seq. to §§60-6,305 Last reviewed: January 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Nevada
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
New Hampshire
New Hampshire (NH) - State Non-Interstate and General Highway System New Hampshire Revised Statutes: Title XXI - Motor Vehicles - Chapter 266 - Equipment of Vehicles Last reviewed: May 2024
New Hampshire (NH) - State Additional Reg. Non-Interstate and General Highway System New Hampshire Revised Statutes: Title XXI - Motor Vehicles - Chapter 266 - Equipment of Vehicles Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
New Jersey
New Jersey (NJ) - State Roads Highways other than the 102†Network New Jersey Revised Statutes: Title 39 - Motor Vehicles and Traffic Regulation - Section 39:3-84 - Vehicles, dimensional, weight limitations; routes, certain; prohibited Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
New Mexico
New Mexico (NM) - State Roads Non-Designated State Highways New Mexico Statutes: Chapter 66 - Motor Vehicles, Article 7 - Traffic Laws; Signs, Signals and Markings; Accidents; Weight and Size; Traffic Safety, Part 5 - Weight and Size Limitations Last reviewed: January 2026
New Mexico (NM) - Permit Excessive Weight Non-Interstate Highways New Mexico Statutes: Chapter 66 - Motor Vehicles, Article 7 - Traffic Laws; Signs, Signals and Markings; Accidents; Weight and Size; Traffic Safety, Section 413.4 Permits for excessive weight Last reviewed: January 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
New York
New York (NY) - Permit Type 1-F1 Qualifying and Access Highways and State and Designated Highways This overweight permit allows for 3 or 4 axle combinations to follow the NY F1 Formula for Gross Weight to a maximum of 97,400 lbs.
New York (NY) - Permit Type 1A-F1 Qualifying and Access Highways and State and Designated Highways This overweight permit allows for 5 or more axle combinations to follow the NY F1 Formula for Gross Weight to a maximum of 102,000 lbs
New York (NY) - Permit Type 7-F2 Qualifying and Access Highways This overweight permit allows for combinations with 6 or more axles, and with an overall wheelbase of at least 438.0 in, to obtain a Gross Weight maximum of 107,000 lb
New York (NY) - Permit Type 6B-F5 Qualifying and Access Highways This downstate overweight permit allows for combinations with 7 or more axles, and with an overall wheelbase of at least 516.0 in, to obtain a Gross Weight maximum of 120,000 lb. It is valid in certain counties
New York (NY) - State Roads State and Designated Highways New York Vehicle and Traffic Laws §385 and §386 Last Reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
North Carolina
North Carolina (NC) - State Roads State Highway System North Carolina General Statutes, Chapter 20-115 et seq Last reviewed: August 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
North Dakota
North Dakota (ND) - State Roads Specified State Highways North Dakota Century Code; Title 39 - Motor Vehicles: Chapter 39-12 - Size, Width, and Height Restrictions; and the North Dakota Administrative Code; Title 37 - Department of Transportation; Article 37-06 - Multiple Vehicle Combinations Last reviewed: February 2026
North Dakota (ND) - Permit 10% Extra Weight Specified State Highways North Dakota Century Code; Title 39 - Motor Vehicles: Chapter 39-12 - Size, Width, and Height Restrictions; and the North Dakota Administrative Code; Title 37 - Department of Transportation; Article 37-06 - Multiple Vehicle Combinations Last reviewed: February 2026
North Dakota (ND) - Load Restriction 6 Ton According to Current Order North Dakota Load Restrictions Last reviewed: February 2026
North Dakota (ND) - Load Restriction 7 Ton According to Current Order North Dakota Load Restrictions Last reviewed: February 2026
North Dakota (ND) - Load Restriction 8 Ton According to Current Order North Dakota Load Restrictions Last reviewed: February 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Ohio
Ohio (OH) - State Roads Non-Interstates and Non-Turnpike Ohio Revised Code, Title 55. Roads - Highways - Bridges, Chapter 5577. Load Limits on Highways Last reviewed: May 2024
Ohio (OH) - Turnpike Ohio Turnpike Rules sourced from OhioTurnpike.org Last reviewed: July 2022
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Oklahoma
Oklahoma (OK) - State Roads State Roads Oklahoma Statute Title 47 Motor Vehicles Last reviewed: November 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Oregon
Oregon (OR) - Permit 105,500 lbs Interstates and Green and Brown Routes in Route Map 7 Oregon Revised Statutes - Chapter 818 - Vehicle Limits Last reviewed: May 2024
Oregon (OR) - State Roads Blue and Some Red Routes in Route Map 7 Oregon Revised Statutes - Chapter 818 - Vehicle Limits Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Pennsylvania
Pennsylvania (PA) - State Roads Non-Interstate Highways Statutes of Pennsylvania, Consolidated Statutes, Title 75, Chapter 49, Size, Weight and Load Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Rhode Island
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
South Carolina
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
South Dakota
South Dakota (SD) - State Roads Non-Interstate Highways South Dakota Codified Laws: Chapter 32-22 – Weight, Size and Load Restrictions Last reviewed: March 2026
South Dakota (SD) - Spring Load 6 Ton According to Current Order South Dakota Spring Load Restrictions Last reviewed: March 2026
South Dakota (SD) - Spring Load 7 Ton According to Current Order South Dakota Spring Load Restrictions Last reviewed: March 2026
South Dakota (SD) - Spring Load 8 Ton According to Current Order South Dakota Spring Load Restrictions Last reviewed: March 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Tennessee
Tennessee (TN) - State Roads State Highways Tenn. Code Ann. Title 55, Chapter 7 Size, Weight and Load Last reviewed: November 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Texas
Texas (TX) - State Roads Non-Interstate Texas Statutes: Title 7. Vehicles and Traffic, Subtitle E. Vehicle Size and Weight, Chapter 621. General Provisions Relating to Vehicle Size and Weight Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Utah
Utah (UT) - Permit Oversized & Overweight As per permit specification Permit conditions listed in the Utah Administrative Code: R909-2. Utah Size and Weight Rule regulation for Oversized and Overweight divisible loads Last reviewed: January 2026
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Vermont
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Virginia
Virginia (VA) - State Roads Non-Designated Highways Code of Virginia, Title 46.2 - Motor Vehicles, Chapter 10 - Motor Vehicle and Equipment Safety Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Washington
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
West Virginia
West Virginia (WV) - State Roads US and WV Routes West Virginia Code, Chapter 17C. Traffic Regulations and Laws of the Road, Article 17. Size, Weight and Load Last reviewed: May 2024
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Wisconsin
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
Wisconsin (WI) - State Roads Class 'B' Highways Wisconsin Statutes: Vehicles - Size, Weight and Load: 348.01 Last reviewed: May 2024
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Wyoming
Wyoming (WY) - State Table 2 Primary and Secondary Roads Wyoming Statutes, Title 31 - Motor Vehicles, Chapter 18 - Commercial Vehicles, Article 8 - Size and Weight Limits. Table 2 Weight Limits Last reviewed: August 2025
United States (US) - Emergency Vehicles Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) Code of Federal Regulations, Title 23, Chapter 127(r): Vehicle weight limitations-Interstate System Last Reviewed: April 2026
US Federal Interstate & National Network Interstate System (Title 23, Section 103) & National Network (App. A to Title 23, Part 658) These regulations are based on Title 23, Part 658 of the US Code of Federal Regulations (1984, amended 2023). However, they incorporate some aspects of state-specific regulations that are not included in the Federal regulations, but that make sense to apply. Common restrictions across the US, like a semi-trailer length of 53′ are included, as are straight truck lengths of 40′ and tire width weight restrictions of 500 lbs per inch for non-steer tires.
Canada
Alberta
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
British Columbia
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Manitoba
Manitoba (MB) - Class B1 Class B1 Routes Manitoba Regulation 155/2018 Last reviewed: February 2024
Manitoba (MB) - RTAC (63.5k) Higher Weight RTAC Routes listed in Sch D of Manitoba Reg 155/2018 (63.5k) Manitoba Regulation 155/2018 Last reviewed: February 2024
Manitoba (MB) - RTAC (62.5k) Other Routes RTAC Routes listed in Sch A of Manitoba Reg 155/2018 (62.5k) Manitoba Regulation 155/2018 Last reviewed: February 2024
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
New Brunswick
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Newfoundland and Labrador
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Northwest Territories
Nova Scotia
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Nunavut
Ontario
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Prince Edward Island
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Quebec
Quebec (QC) - Seasonal Thaw Period Ordinary Class Highways Quebec C-24.2, r. 31 - Vehicle Load and Size Limits Regulation Last reviewed: September 2026
Quebec (QC) - Transitional Provincial Ordinary Class Highways Quebec C-24.2, r. 31.1 - Chapter V - Selected combinations are listed as having transitional regulations applied until December 31, 2029 Last reviewed: September 2026
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Saskatchewan
Saskatchewan (SK) - Primary Weights Primary Highways defined in Appendix D and those defined by Minister's Order Saskatchewan Chapter H-3.01 Reg 8 as amended to Regulation 81/2022 Last reviewed: January 2024
Saskatchewan (SK) - Winter Weights Primary Primary Highways defined in Appendix D and those defined by Minister's Order Saskatchewan Chapter H-3.01 Reg 8 as amended to Regulation 81/2022 Last reviewed: January 2024
Saskatchewan (SK) - Winter Weights Secondary Secondary and Municipal Highways and those defined by Minister's Order Saskatchewan Chapter H-3.01 Reg 8 as amended to Regulation 81/2022 Last reviewed: January 2024
Saskatchewan (SK) - Secondary Weights Secondary and Municipal Highways and those defined by Minister's Order Saskatchewan Chapter H-3.01 Reg 8 as amended to Regulation 81/2022 Last reviewed: January 2024
Canada - MOU 2022 Designated Highway Systems The Memorandum of Understanding (MOU) on Interprovincial Weights and Dimensions (MOU) is intended to provide improved uniformity in weight and dimension limits, through the establishment of minimum and/or maximum thresholds acceptable to all jurisdictions, for eight configurations of vehicles commonly used in interprovincial transportation. Last Amended October 2022 Last reviewed: January 2024
Yukon
Australia
Australian Capital Territory
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
ACT - Exemption Truck & Dog Network of Stated routes and areas National Class 3 Truck and Dog Trailer Mass Exemption Notice 2023 (No.1) (C2023G01213) Last reviewed: February 2026
National - Beta HVNL Reform Network of Stated routes and areas This regulation is a beta version of the Heavy Vehicle Regulation based on modifications described in the HVNL information session by Jose Arredondo on May 6, 2026. Last reviewed: June 2026
National - Exemption Long Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
New South Wales
New South Wales - Exemption Zero Emissions New South Wales Class 3 Zero Emission Vehicle Mass and Dimension Exemption Notice Last reviewed: June 2026
New South Wales (NSW) National Regulations, with modifications for New South Wales, such as increased weights for rear-loading compactors Last reviewed: November 2024
National Heavy Vehicle (Mass, Dimension and Loading) National Regulation Last reviewed: February 2021
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - Beta HVNL Reform Network of Stated routes and areas This regulation is a beta version of the Heavy Vehicle Regulation based on modifications described in the HVNL information session by Jose Arredondo on May 6, 2026. Last reviewed: June 2026
National - Exemption Long Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
Northern Territory
Queensland
Queensland (QLD) - Permit ZEHV Queensland Zero Emission Heavy Vehicle Permit-Based Scheme Last reviewed: October 2024
National Heavy Vehicle (Mass, Dimension and Loading) National Regulation Last reviewed: February 2021
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
Queensland (QLD) - Exemption Truck & Dog Network of Stated routes and areas National Class 3 Truck and Dog Trailer Mass Exemption Notice 2023 (No.1) (C2023G01213) Last reviewed: February 2026
National - Beta HVNL Reform Network of Stated routes and areas This regulation is a beta version of the Heavy Vehicle Regulation based on modifications described in the HVNL information session by Jose Arredondo on May 6, 2026. Last reviewed: June 2026
National - Exemption Long Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
South Australia
National Heavy Vehicle (Mass, Dimension and Loading) National Regulation Last reviewed: February 2021
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
South Australia (SA) - Exemption Truck & Dog Network of Stated routes and areas National Class 3 Truck and Dog Trailer Mass Exemption Notice 2023 (No.1) (C2023G01213) Last reviewed: February 2026
National - Beta HVNL Reform Network of Stated routes and areas This regulation is a beta version of the Heavy Vehicle Regulation based on modifications described in the HVNL information session by Jose Arredondo on May 6, 2026. Last reviewed: June 2026
National - Exemption Long Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
Tasmania
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - Beta HVNL Reform Network of Stated routes and areas This regulation is a beta version of the Heavy Vehicle Regulation based on modifications described in the HVNL information session by Jose Arredondo on May 6, 2026. Last reviewed: June 2026
National - Exemption Long Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
Victoria
National Heavy Vehicle (Mass, Dimension and Loading) National Regulation Last reviewed: February 2021
National - PBS Level 1 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
National - PBS Level 2 Based on the PBS Vehicle Combinations document and PBS Standards and Vehicle Assessment Rules Last reviewed: September 2024
Victoria (VIC) - Exemption Truck & Dog Network of Stated routes and areas National Class 3 Truck and Dog Trailer Mass Exemption Notice 2023 (No.1) (C2023G01213) Last reviewed: February 2026
New South Wales (NSW) - Exemption Truck & Dog Network of Stated routes and areas National Class 3 20m Long 3-axle Truck and 4-axle Dog Trailer Mass and Dimension Exemption Notice 2024 (No.1). (C2024G00257) Last reviewed: February 2026
Western Australia
Western Australia (WA) - AMMS Level 1 Accredited Mass Management Scheme (AMMS) Permits sourced from the Main Roads Western Australia Website Last reviewed: September 2024
Western Australia (WA) - AMMS Level 2 Accredited Mass Management Scheme (AMMS) Permits sourced from the Main Roads Western Australia Website Last reviewed: September 2024
Western Australia (WA) - AMMS Level 3 Accredited Mass Management Scheme (AMMS) Permits sourced from the Main Roads Western Australia Website Last reviewed: September 2024
Rest of World
Austria
Belgium
Bulgaria
Croatia
Cyprus
Czechia
Denmark
Estonia
Finland
France
Germany
Greece
Hungary
Ireland
European Union - Council Directive 96/53/EC Road vehicles circulating within the Community the maximum authorized dimensions in national and international traffic and the maximum authorized weights in international traffic Last reviewed: June 2025
Italy
Kenya
Latvia
Lithuania
Luxembourg
Malta
Netherlands
New Zealand
Poland
Portugal
Romania
Slovakia
Slovenia
South Africa
PBS (Tridem Tridem Interlink at 73.5t) Specified in permit PBS (Tridem Tridem Interlink at 73.5t) Last reviewed: January 2023
PBS (Tridem Tridem Interlink at 87.5t) Specified in permit PBS (Quad Quad Interlink at 87.5t) Last reviewed: April 2026