Driving too fast in a commercial vehicle is a major cause of vehicle accidents. Because of their size, high center of gravity, and weight, semi-trucks and other commercial vehicles are particularly susceptible to speed-related crashes.

Excessive speed generally refers to exceeding the posted speed limit for a particular stretch of road or freeway. Complying with the speed limit is critical for safety. However, just because a truck driver is within a speed limit does not mean they are being safe. The FMCSA further prohibits truck operators from driving too fast for conditions.