Exo commuter rail

Exo commuter rail (reporting marks EXO) is a system of five radial commuter rail services serving the Greater Montreal area, operated by Alstom, using trackage owned by Exo as well as by the Canadian National Railway and Canadian Pacific Kansas City.

Exo's commuter trains are its highest-profile division. It uses diesel-electric push-pull trains. The Mont-Saint-Hilaire and Mascouche lines run on Canadian National trackage and operate out of Central Station, while the Vaudreuil-Hudson, Saint-Jérôme, and Candiac lines run on Canadian Pacific Kansas City (CPKC) trackage and operate out of Lucien L'Allier terminus, beside the historic Windsor Station. The Saint-Jérôme line also runs on Exo's own trackage between Sainte-Thérèse and Saint-Jérôme, as does the Mascouche line between Repentigny and Mascouche and the Vaudreuil-Hudson line between Vaudreuil and Hudson.

Operation of all commuter rail was provided by contract to CN and CP (on their respective rail networks) until June 30, 2017. Operations were taken over by Alstom (then Bombardier Transportation) beginning July 1, 2017, on an 8-year contract.

The train lines are part of Greater Montreal's integrated public transit network including bus, regional rail (REM) and Metro, coordinated by the Autorité régionale de transport métropolitain (ARTM). Many train stations serve local bus terminals, and a few provide connections to Metro, REM and Via Rail and Amtrak national rail services.

Canadian National (CN) and Canadian Pacific (CP) had long operated commuter trains in the Montreal area, but by the 1980s, their services had dwindled to one route each. The Commission de transport de la communauté de Montréal (CTCUM, predecessor of the STM), which already managed Metro and bus services across the Island of Montreal, assumed management of CN's Deux-Montagnes commuter service and CP's Rigaud service in 1982 as the two railways began scaling back their services.

In 1997, management and financing of both lines was transferred to the newly created Agence métropolitaine de transport (AMT), which had been established to distribute funding and coordinate transportation planning among the numerous transit operators throughout the Greater Montreal Region.

Later that year, the AMT inaugurated service between Blainville and Jean-Talon (now Parc) train station in Montreal's Park Extension district. Originally, the service was designed to provide a temporary alternative for motorists from Laval and the North Shore of Montreal, while the Highway 117 Dufresne Bridge was being repaired. The service proved to be so popular that the AMT continued to fund it, and even extended a number of trains to the Lucien-L'Allier station downtown in 1999, and continues to provide off-peak daytime weekday service on this line. The service was extended further north to Saint-Jérôme in January 2007.

In 2000, the AMT inaugurated its service to McMasterville, and later extended it to Mont-Saint-Hilaire in September 2002.