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Frequently Asked Questions

What impact will the construction of the REM have on current commuter train service? (Deux-Montagnes and Mascouche lines)

The REM will gradually replace the Deux-Montagnes line in 2022 and 2023.

The work involves replacing the train with an automated light rail transit system. The tracks and power supply will be changed over 30 km, 12 enclosed stations will be built and 3 connections will be added to the McGill and Édouard-Montpetit stations and the Mascouche line. Existing infrastructure such as the tunnel under Mount Royal and the railway bridges will also be renovated and modernized.

⚠ In progress: Beginning of construction of McGill, Édouard-Montpetit, Canora and Mont-Royal stations and of the Saint-Eustache maintenance centre. There is currently no service on Friday nights and weekends on the Deux-Montagnes and Mascouche lines.

Upcoming work:

  • March 25, 2019: Update of schedules for the Deux-Montagnes and Mascouche lines (more information)
  • May 21, 2019: Implementation of a shared platform for the Canora and Mont-Royal stations (more information)
  • January 2020 to early 2022: Closure of the Central Station Centrale–Du Ruisseau segment – the Deux-Montagnes line stops at Bois-Franc, while the Mascouche line stops at Ahuntsic
  • Mid-2021 to end 2023: Complete closure of the Deux-Montagnes line
  • Early 2022: Commissioning of the REM at Du Ruisseau
  • End 2023: Commissioning of the REM at Deux-Montagnes

To learn more about the work and alternate transportation options, consult our specific page: Deux-Montagnes and Mascouche lines