<P> ADR (formally, the European Agreement concerning the International Carriage of Dangerous Goods by Road (ADR)) is a 1957 United Nations treaty that governs transnational transport of hazardous materials . "ADR" is derived from the French name for the treaty: Accord européen relatif au transport international des marchandises Dangereuses par Route). </P> <P> Concluded in Geneva on 30 September 1957 under the aegis of the United Nations Economic Commission for Europe, it entered into force on 29 January 1968 . The agreement was modified (article 14, paragraph 3) in New York City on 21 August 1975, though these changes only took effect on 19 April 1985 . A new amended ADR 2011 entered into force on 1 January 2011 . Annexes A and B have been regularly amended and updated since the entry into force of ADR . Consequently, to the amendments for entry into force on 1 January 2015 (until June 2017), a revised consolidated version has been published as document ECE / TRANS / 242, Vol . I and II . A further revision applies from 1 January 2017 </P>

European agreement on the transport of dangerous goods by road