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Light rail

The REM is a fully automated light rail transit network, one of the world’s safest technologies.

Safe and reliable technology

The REM technology is fully automated, 100% electric light rail. Trains are driverless, directed by a control centre that ensures proper functioning of equipment at all times. The platforms will be protected by screen doors that only open after the train has arrived; users cannot cross the tracks or drop objects onto them. This type of automated system is one of the safest and most reliable in the world.

Over 70 cities in the world have created networks for light rail transit

The Metropolis model

The REM will use Alstom Metropolis trainsets, in a design to be unveiled in 2019. Inside and outside, the REM cars will be quite similar to the Montréal metro. As REM trains will be automatic and driverless, passengers will be able to sit at the front of the car and view the city from the windows. The cars will be designed to be accessible to people with reduced mobility. Just like in the metro, bicycles will be allowed outside of peak times. (Photo: prototype of the Alstom Metropolis trainsets for the the Sydney metro)

Alstom Metropolis Sydney


The REM’s frequency will depend on segments and schedules.

  • Rive-Sud to Bois-Franc: 2.5 min. during peak hours; 5 min. during off-peak
  • Bois-Franc to Deux-Montagnes: 5 min. during peak hours; 15 min. during off-peak
  • Bois-Franc to Montréal-Trudeau Airport: 10 min. during peak hours; 15 min. during off-peak
  • Bois-Franc to Sainte-Anne-de-Bellevue: 10 min. during peak hours; 15 min. during off-peak

To learn more about your future station (location, frequency, services, etc.), check our interactive map.

Yes. The REM has been designed to accommodate increases in ridership.

Once commissioned, the REM will have a frequency of 150 seconds on the main segment (Rive-Sud – Bois-Franc) during peak hours. However, its technology allows for a frequency of up to 90 seconds, which means that capacity can be increased by two-thirds. If ridership increases significantly in coming decades, the frequency and number of trains in service on the network may be increased accordingly.

Harsh winter conditions represent a significant challenge for any train or light rail system operator. For the purpose of the REM’s winter plan, specialized equipment will be used for maintenance and a dedicated field team will make sure the system runs smoothly.

The REM’s high frequency (which varies between 2.5 and 15 minutes) will also allow us to keep a close eye on operations at all times, so we can quickly identify any issues. Since trains will be running regularly over the tracks, this will help prevent ice and snow from accumulating like it would on a highway. In exceptional cases, it will be possible to keep the REM running through the night, to prevent precipitation from accumulating on the track and catenary.

The REM will run in part on existing rail corridors. For safety reasons, level crossings will be eliminated. In places where level crossings currently exist, the road will be raised or lowered or the railway track will be elevated (the REM will run on an elevated track above the road).

REM design consultation

Mont-Royal, L’Expo or Saint-Laurent: Did you have a preference among the three proposed REM designs? In July 2018, we launched a consultation to gather your comments and ascertain trends. We are currently finalizing the design with the manufacturer. The winning design will be announced in 2019.

Network map