The TIR system not only covers customs transit by road but a combination is possible with other modes of transport (e.g., rail, inland waterway, and even maritime transport), as long as at least one part of the total transport is made by road.
Un regolamento complementare a quello generico della CMR e che ogni operatore coinvolto deve conoscere è quello relativo al trasporto di merci pericolose, armonizzato anch'esso a livello sovranazionale (europeo) dalle regole dell'European Agreement concerning the International Carriage of Dangerous Goods by Road.