stm halted Orange Line trains after equipment on the tracks generated smoke near Rosemont station, forcing a shutdown between Berri-UQAM and Henri-Bourassa for about an hour. The interruption began around 12: 30 pm ET and portions of the line re-entered service by 12: 45 pm ET, with normal service announced at 1: 36 pm ET. Montreal fire department crews and stm staff implemented emergency ventilation and on-site support as the situation was resolved.
Stm response and timeline
The most critical facts are clear and compact: equipment produced smoke beside the tracks near Rosemont, prompting an immediate safety shutdown of the Orange Line between Berri-UQAM and Henri-Bourassa. Service went down around 12: 30 pm ET, the affected portion re-entered service around 12: 45 pm ET, and full normal service was announced at 1: 36 pm ET. stm activated emergency protocols while Montreal fire department personnel were called to assist.
stm issued a direct operational note explaining the safety steps taken. “In such situations, our protocols require us to proceed with emergency ventilation, ” STM said. That ventilation procedure, carried out with fire department support, was central to restoring service quickly and without escalation.
Immediate reactions
“While there was smoke, there was no fire at the station, but the fire department was called in to support STM staff, ” William Murray, Montreal fire department spokesperson, said. The City of Pointe-Claire also adjusted its calendar amid unrelated severe weather: “The City of Pointe-Claire would like to inform that, due to the severe weather forecast, the STM will be postponing its public event originally scheduled for this Wednesday, March 11. ” City officials urged caution for travel tied to the forecasted freezing rain.
Operationally, stm communicated an initial expectation that the affected portion would resume later in the afternoon, and then updated that timeline faster than anticipated when teams secured the affected area and the ventilation cleared smoke from the tracks. STM staff and fire department personnel coordinated on site to restore normal operations.
Quick context and related service changes
The stm incident at Rosemont unfolded against a background of wider transit planning in the region. The City of Pointe-Claire said the postponed public information event was to present a major bus network redesign linked to a new REM branch opening planned for spring 2026. The postponement notice emphasized safety and the need to limit non-essential travel during a forecasted freezing rain episode.
Across both items, stm operational priorities—safety, ventilation protocols and clear communication—drove decisions in real time when smoke was detected and when severe weather threatened public meetings tied to transit redesigns.
What happens next: stm will remain on alert and continue investigations into the equipment issue that produced smoke; the City of Pointe-Claire will announce a new date for the postponed public meeting. Transit users should expect further stm notices on operational impacts or scheduling tied to the bus redesign ahead of the REM branch opening in spring 2026. Watch for official stm updates and municipal announcements as investigators and planners complete their follow-up work.
Timestamp: 1: 36 pm ET — latest operational update confirming normal Orange Line service and the postponement notice for the public event.
