Parts of the REM network briefly out service

Highway 40 is shown in the direction of Montreal from a REM train during its inaugural run on the West Island line in Montreal, on Friday, May 15, 2026. (Graham Hughes/The Canadian Press)

Two days after the West Island branch of the Réseau express métropolitain (REM) opened to the public, a portion of the new section experienced its first breakdown.

According to the REM’s social media account, there was a service interruption between the Des Sources and Bois-Franc stations on Wednesday afternoon.

There was also a simultaneous interruption between Île-Bigras and Montpellier stations.

The cause was a “rolling stock issue,” according to the post, which was published at 3:29 p.m.

Service resumed on the entire network shortly before 4:15 p.m.