CN and AMT began negotiating last spring on the possible sale of the electrified Deux-Montagnes Line, including the Mount Royal tunnel. AMT’s ownership of the right-of-way will facilitate adding passenger service on the line, AMT’s busiest, and also reduce potential scheduling conflicts with CN freight trains.
The 18.6-mile, 12-station route carries 45% of the agency's annual ridership. Opened in 1918 by CN predecessor Canadian Northern Railway, the Deux-Montagnes Line extends northward from downtown's Central Station (also VIA's terminal station in Montreal).
AMT has been leasing the line from CN, which operates freights over a portion of the line during two windows: 8:30 a.m. - 3:30 p.m., and 8:30 p.m. to 5:30 a.m. With AMT as owner, its trains would have priority between 5:30 a.m. and 8:30 p.m.