MONTREAL - A one-block stretch of Viger Ave. is now closed and expected to remain off-limits to drivers until June.

Construction crews have shut Viger Ave. between St. Denis St. and Sanguinet St. while they build a pedestrian tunnel linking the new buildings for the CHUM, also known as the French superhospital.

The tunnel will also connect to the Champ de Mars metro station.

Crews will begin by excavating a 22-metre long, 11-metre wide tunnel, and will then add several corridors; one for utilities, a second for hospital staff, and a third for the general public.

While work is taking place drivers heading west can either turn north on Berri St. and detour via Rene Levesque Blvd., or they can head south on St. Denis St. then turn onto Notre Dame St.