There are lots of those sorts of things that you can do. On a high-speed rail corridor, it's light rail that you use, and depending what motive structure you use, it doesn't necessarily have to be as wide as a heavy train dual system.
Dans le corridor du train à grande vitesse, on utilise un rail léger qui, selon le type de la structure, n'est pas nécessairement aussi large qu’une ligne à double voie pour les convois lourds.