The ADR warning sign is intended for vehicles transporting hazardous materials. For this type of transported material, the ADR marking plate is a mandatory marking of the vehicle. Vehicles transporting hazardous materials in tanks or in bulk should have orange plates with identification numbers. The vehicle must be marked with an orange distinguishing plate, large at the front and at the rear. In accordance with the requirements of the ADR agreement, the board we offer has dimensions of 40 x 30 cm and a width of the black, non-reflective frame of 1.5 cm. In the case of small vehicles in which the installation of an orange ADR marking board with dimensions of 40 × 30 cm is not possible, it is allowed use of a smaller board with dimensions of 30 x 12 cm.