Things are gradually getting back to normal after Montreal's regional transit agency reported major delays on three train lines Tuesday morning.

Service was slow on the Montreal / Dorion-Rigaud line between Dorval and Lucien-l'allier because of a signal outage on the CP rail lines used by the commuter trains.

Trains #16, 18, 20 and 40 were affected.

The same delays were reported on the Montreal / Delson-Candiac line.

At one point there were no trains running between Montreal-Ouest station and Lucien-l'Allier, but things have since started running again.

Trains were also paralyzed on the Montreal / Blainville-Saint-Jerome line between Montreal-Ouest and Lucien-l'allier.