Vehicles carrying dangerous goods shall comply with the requirements of Annex B to ADR, which contains vehicle and tank specifications and other operational requirements. As regards ADN, the classification of areas of tankers requiring explosion protection and the classification of the category of equipment shall be introduced in order to adapt the requirements applicable to such ships to the current requirements of Directive 2014/34/EU 3. The road transport of dangerous goods is subject to international rules and is closely monitored. Most European countries are bound by the European Convention on the International Carriage of Dangerous Goods by Road (ADR). .