Around 6 a.m. Sunday, only the Yellow line was functioning normally, but full service was restored about an hour later.
It was a difficult Sunday morning for Montreal métro users when it opened.
Around 6 a.m., there were service interruptions on three of the four métro lines, for an indefinite period, “due to a computer system failure.”
Only the Yellow line was functioning normally.
The outage affected the entire Blue and Green lines.
The service interruption also affected the Orange line between Côte-Vertu and Rosemont stations.
Service returned to normal on all Montreal métro lines about an hour later.