Under VIA's plan, Quebec-to-Windsor travel would involve the REM

Passengers travelling from Quebec City to Toronto may have to take three trains to get to the final destination according to VIA Rail’s current plan to build a dedicated rail in the Windsor corridor.
The proposed $4-billion project to have dedicated tracks along the Quebec-Windsor route would allow the crown corporation to boost the number of trips in the corridor. However, VIA’s heavy rail passenger trains will likely be incompatible with the planned transformation of the Mount Roya