Increasing existing truck size and weight limits would mean higher taxpayer costs to repair damage to our highways and bridges; more highway gridlock; and more harm to the environment. The taxes and fees that heavy trucks pay are already far less than the cost of the damage heavy trucks cause. This multi-billion dollar annual underpayment — which other motorists and the general public have to make up for through higher taxes — would become even greater if truck size and weight limits were increased.
In April 2016, the U.S. Department of Transportation (DOT) released the final results of a study examining the impacts of increasing current federal truck size and weight limits. The DOT study concluded that no changes to federal policy on truck size and weights should be made at this time.