What must you always carry while operating a commercial vehicle?

When operating a commercial vehicle, it is essential to carry your Commercial Driver's License (CDL), medical card, and vehicle registration. The CDL is required by law for anyone driving a commercial motor vehicle, as it certifies that the driver has met the necessary training and testing requirements specific to operating larger or commercial vehicles. The medical card demonstrates that the driver meets health standards set by the Department of Transportation, ensuring they are physically fit to drive. Vehicle registration is essential as it proves that the vehicle is legally registered for use on public roads.

While having a driver's license and vehicle insurance is also important, the specific combination of a CDL, medical card, and vehicle registration is mandatory for commercial operation. Maps and navigators can assist in route planning, and emergency contact information is valuable in case of an incident, but they are not legally required to be carried while driving a commercial vehicle.