ADR is an abbreviation of French words; Accord Européen Relative Au Transport International Des Marchandises Dangereuses Par Rout. It is a European Convention on the Carriage of Dangerous Goods on International Roads.

It is an international treaty that was prepared in Geneva on September 30, 1957 and entered into force in 1968. Turkey became a party to the ADR agreement as the 48th country on 22.03.2010.

The aim of this agreement is to protect human health and the environment; is to prevent risks that may occur during the transportation of dangerous goods. ADR sets a standard for the substances that constitute the hazard class on the highways and their transportation. With ADR, the main purpose of which is to ensure the safe transportation of dangerous goods, it is also aimed to classify dangerous goods, determine conditions, and make routes and parking spaces suitable for certain criteria.