Quebec implemented significant overhauls to its truck size and weight regulations, effective January 1, 2026. At TruckScience, we support vehicle operators, equipment manufacturers and fleet managers through changes such as this. So we have updated the TruckScience Axle Weight Calculator library to reflect these new rules, under a dedicated regulations set: Quebec – Transitional Provincial.…

The Australian Heavy Vehicle National Law (HVNL) reforms – coming into effect on 1 August 2026 via the Heavy Vehicle National Law Amendment Regulation 2026 represent one of the most significant updates to Australian heavy vehicle transport regulations in over a decade. TruckScience’s AU: National regulation set has been fully updated to reflect these amendments. Both new and…

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…

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…

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,…

  TruckScience is just back from Truck World 2026 in Mississauga, Ontario. Held from April 16-18 at The International Centre, the event was – as always – as busy as it was enlightening! Truck World promotes itself as “the premier destination for trucking executives, fleet managers, and governmental entities seeking to explore the latest trucks, equipment,…

  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…

  We’re not long home from exhibiting at Work Truck Week 2026 in Indianapolis, and what a week it was! It’s the largest annual event dedicated to the work truck and fleet industry, hosted by the NTEA – The Work Truck Association. The event brings together thousands of fleet managers, truck manufacturers, upfitters, engineers, and…

  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…