Do you have to a sign on commercial vehicle?

In many jurisdictions, yes. For example, in the United States, the Federal Motor Carrier Safety Administration (FMCSA) requires certain commercial vehicles to display certain signs, such as:

* Vehicle identification signs: These signs identify the owner or operator of the vehicle. They must be displayed on both sides and the rear of the vehicle.

* Placard signs: These signs indicate the hazardous materials that are being transported in the vehicle. They must be displayed on all four sides of the vehicle.

* Hazardous materials placards: These placards identify the specific hazardous materials that are being transported in the vehicle. They must be displayed on both sides and the rear of the vehicle.