According to a 2012 joint study conducted by the Virginia Tech University Transportation Institute and the American Transportation Research Institute, lower speed limits would mean fewer truck crashes on U.S. highways.
The comprehensive study examined data from 20 different trucking fleets,15,000 accidents, and 138,000 tractor-trailers.
The results of the study showed that lower speed limits result in fewer crashes, less serious injuries when crashes do occur, and an increase in overall traffic safety.
Now, the study is being used by the National Highway Traffic Safety Administration (NHTSA) to support a proposed rule that would require Speed Limiters on tractor-trailers. If Speed Limiters become mandatory on trucks, tractor-trailers will no longer be capable of driving faster than 68 miles per hour.