The project was delivered with major cost savings compared with traditional North American rail projects, largely by using existing rail corridors and elevated tracks instead of extensive tunnelling. Builders say the automated system reduces construction and long-term operating costs, while allowing higher service frequency and reliability.


The REM, Réseau Express Métropolitain, is being cited as a potential model for future Canadian transit projects, showing that large-scale public transport can be built more efficiently. The network links downtown Montreal with surrounding suburbs and employment hubs, aiming to reduce car use and congestion.