Why is it important for a commercial driver to know their vehicle’s height, width, and length?

Understanding a commercial vehicle's height, width, and length is crucial for ensuring safe navigation, particularly under overpasses and through narrow spaces. This knowledge helps drivers to assess whether their vehicle can safely clear overpasses without risk of collision. It also allows them to identify suitable routes that can accommodate the vehicle's dimensions, avoiding low bridges, tunnels, or narrow streets that could pose hazards. When a driver is aware of their vehicle's size, they can make informed decisions that enhance safety for themselves as well as others on the road.