HAZARD Identification ADR signal and UN number.
The HAZARD Identification ADR signal and UN number is available in reflective metal plate material with 400×300 mm measurements.
Conventional sign: rectangle with border, horizontal line and black number on orange background.
Transport units carrying dangerous goods shall bear, arranged for a vertical plane, two orange rectangnlar panels. One shall be fixed to the front of the transport unit and the other to the rear, perpeodicularmeote to the loogitudinal axis of the transport unit. They must be very visible.