However, RFF does not let these run on French railways, so there are plans to certify Alstom Prima II locomotives for use in the tunnel.
然而法国铁路网络（法语：Réseau ferré de France）并未准许这些机车在法国铁路行走，故亦有计划让阿尔斯通的Prima II机车在隧道内服务。