Further related legislation exists which applies to railway operations that are covered by directive 91/440: The directive was further clarified and extended by EU directive 2001/12 which initially allowed cross border freight operations on a network of tracks – to be called the Trans European Rail Freight Network a network which includes ports and freight terminals.
Der findes yderligere lovgivning som omhandler jernbanedrift der er dækket af direktivet: Direktivet blev yderligere uddybet og forklaret samt udvidet af EU-direktiv 2001/12 som indledningsvis tillod grænseoverskridende godstrafik på et netværk, kaldet the Trans European Rail Freight Network, som omfatter havne og godsterminaler.