Lowboy Auto Hauler Fairness Act of 2025

This bill lets certain auto-hauling trucks be longer on highways. It says a truck with a lowboy trailer can be up to 80 feet long as long as the front overhang is under 4 feet and the rear overhang is under 6 feet. States would not be allowed to set a shorter limit for these trucks. It also defines a “lowboy trailer” as a semitrailer with a lowered middle section used to carry assembled highway vehicles, and it removes the rule that lowboy trailers must have a warning flag on the rear overhang. If enacted, these changes would apply nationwide.

Key points

• Who is affected: Auto haulers, truck drivers using lowboy trailers, and state highway officials.
• What changes: Sets a minimum allowed length of 80 feet for a truck tractor–lowboy trailer combo with small overhangs; no rear overhang flag required for lowboy trailers.
• What is a lowboy trailer: A semitrailer with a dipped middle section used to carry assembled vehicles.
• When: Would take effect if the bill becomes law.