Automatic low‑speed test trains started operating on the future REM line to Montréal‑Trudeau Airport during the week of August 13, 2026. The trial runs are part of the Réseau express métropolitain's effort to finalize the airport segment of its rapid‑transit network.
The REM, a new rapid‑transit system under construction across Greater Montreal, has planned an extension that will connect the city’s main airport to its existing lines. The introduction of these test trains marks the first operational activity on the dedicated airport branch, allowing engineers to evaluate system performance before passenger service begins.
The test phase is scheduled to continue as the project moves toward its target of completing the airport segment by the end of 2027. The timeline aligns with the broader REM rollout, which aims to provide a high‑frequency, electric rail service throughout the metropolitan area. By the close of 2027, the airport branch is expected to be fully integrated into the network, offering direct rapid‑transit access to Montréal‑Trudeau Airport.
The use of automatic low‑speed trains during this period is intended to verify track alignment, signaling, and power systems under controlled conditions. These preliminary runs help identify any adjustments needed before the line can accommodate regular, higher‑speed passenger trains.
The commencement of testing reflects the REM's ongoing progress as it expands its reach across the region. With the airport connection slated for completion within the next two years, the system will enhance mobility options for travelers and commuters alike, linking air travel with the city's broader public‑transit framework.