In the United States, some states restrict certain commercial vehicles from making right turns on red. Typically, these restrictions apply to vehicles that are overweight or over the length maximum of 23 feet (7 meters). These rules may also vary for buses and large commercial vehicles in specific locations, cities, or states.
Restrictions on commercial vehicles are implemented as safety measures due to their heavy weight and impact on overall traffic conditions. Commercial vehicles may have slower acceleration and turning response rates, which poses increased safety risks for pedestrians, vehicles, and cyclists at intersections.
