ADR, formally the European Agreement of 30 September 1957 concerning the International Carriage of Dangerous Goods by Road, 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). From 1 January 2021, the treaty will be renamed Agreement concerning the International Carriage of Dangerous Goods by Road as the term "European" in the incorrectly may give the impression that the treaty is only open for accession to European states.