Heavier truck weight limits face broad opposition in Congress

Heavier truck weight limits are back on the agenda in Washington, with a coalition of 20 national organizations urging Congress to reject measures that would allow larger tractor trailers on the nation’s roads, highways and bridges, as reported by Progressive Railroading.

The coalition says increasing truck weight limits would accelerate damage to road infrastructure, and it points to local bridges as a key concern. Signatories include the Association of American Railroads (AAR), the American Short Line and Regional Railroad Association, GoRail, the National Railroad Construction and Maintenance Association, the Railway Engineering-Maintenance Suppliers Association, the Railway Supply Institute, SMART-TD and the Coalition Against Bigger Trucks (CABT), alongside organizations representing local governments, organized labor, motorists and the trucking industry.

AAR coalition letter targets surface transportation reauthorization

In a Jan. 28 letter circulated during surface transportation reauthorization to leaders of the House and Senate committees responsible for transportation legislation, the coalition asked lawmakers to oppose any bill that would increase maximum truck weight or length limits on federal highways.

Don’t miss…Newag Impuls EMU contract adds seven 45WE trains for Lesser Poland

It also said its opposition goes further than a simple change in the cap. The group objected to increases framed as a “pilot program,” to any state or commodity exemptions or waivers of current federal limits, and to provisions that would allow states to regulate truck weight limits for interstate commerce.

Proposals to increase federal truck weight limits resurface

The letter arrives as lawmakers consider proposals that would raise allowable weights from the current 80,000 pounds to as much as 156,000 pounds. CABT said in a press release that Congress has repeatedly rejected similar ideas, even as shipping companies continue to promote higher limits as a way to improve profits.

Coalition Against Bigger Trucks bridge analysis highlights local impacts

The coalition singled out the impact of heavier trucks on local bridges and cited a 2025 CABT bridge analysis. It found that more than 68,600 local bridges are not rated to safely accommodate 91,000-pound trucks, and CABT said those bridges would have to be replaced if Congress approves heavier trucks, at a cost to taxpayers of more than $78.7 billion.

The House and Senate committees responsible for setting transportation priorities are due to draft their respective transportation bills by March.

News on railway transport, industry, and railway technologies from Railway Supply that you might have missed: