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  Construction of REM Project in Montreal

  The Montreal Réseau Express Métropolitain (REM) is the fourth largest automated transportation system in the world. The design fosters environmentally sustainable transportation. As a single, integrated transportation network, the REM will be connected to bus networks, commuter trains and the Montréal metro. The REM represents construction costs of approximately 6.3 billion Canadian dollars. The project consists of 67 km of twin tracks over four branches connected to downtown Montreal. The project includes 26 stations with 3 underground stations in downtown Montreal. One of the underground stations will be built using the NATM method and the two others with the cut and cover approach. The project also includes the rehabilitation and enlargement of the Mont Royal Tunnel. This 100-year-old double track tunnel is about 5 km long. The REM also consists of 3.6 km new TBM tunnel connecting downtown to the Montreal International Airport. This paper presents the design and construction aspects of the underground elements of this mega project.

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