The primary route is based around the Mount Royal Tunnel, where new underground stations are proposed to be built to connect with the existing McGill and Édouard-Montpetit Metro stations.
In the city center, three stations would be built to interconnect with existing metro lines; McGill would connect with the Green Line,[REF] Édouard-Montpetit would connect with the Blue Line[REF] and Bonaventure Gare Centrale would connect with the Orange Line.