Major disruptions on Montreal roads this weekend
Posted March 27, 2026 9:15 am.
Motorists in the Montreal area should prepare for major obstructions over the weekend.
SAINT-PIERRE INTERCHANGE
Friday 10 p.m. to Monday 5 a.m.
- Complete closure of the ramp leading from the A-20 west (exit 63) to the Hwy. 138 west / Honoré-Mercier bridge
Detour: in exit 63, via the junction to Montreal-Toronto Boulevard / 1re Avenue.
Risk of congestion on A-20 West, upstream of exit 63, Saturday and Sunday during the day. Plan your trips.

TO PLAN
Highway 10 / Bonaventure
- In Montreal (arr. Le Sud-Ouest)), on the A-10 (Bonaventure) in both directions, new lane configuration between the Victoria and Clément bridges, until April 6.
Work under the responsibility of JCCBI.
Avenue De Lorimier
- In Montreal (Ville-Marie district), on De Lorimier Avenue, between René-Lévesque and De Maisonneuve boulevards, complete closure northbound and partial closure of 1 out of 3 southbound lanes, Monday to Wednesday from 7 a.m. to 7 p.m. and Thursday from 7 a.m. to 6 p.m., for a period of 5 weeks.
Note: On René-Lévesque Boulevard East, closure of the left-turn lane for De Lorimier Avenue northbound.
Water main rehabilitation work, under the responsibility of the City of Montreal.
Viger Avenue East
- In Montreal (Ville-Marie district), on Viger Avenue East, between the access ramp for Hwy. 136 West and Wolfe Street, until the beginning of April:
- Partial closure of 1 lane out of 3 during the morning rush hour, from 5 a.m. to 10 a.m.
- Partial closure of 2 lanes out of 3, from 10 a.m. to 10 p.m. (Monday to Thursday) and at 5 a.m. the next day (Friday to Sunday).
- The access ramp to Hwy. 136 West will remain open, according to the same schedule.
- Optional route: via René-Lévesque Boulevard East.
Replacement work on a watermain under the responsibility of the City of Montreal.
Route 138 in Montreal (arr. LaSalle)
- In Montreal (LaSalle arr.), partial closure of 1 out of 2 lanes in exit 2 of the Hwy. 138, in both directions, until April 18, 2026.
Long-term work on Clément Street, at Louis-Fortier Street, under the responsibility of the City of Montreal.
Highway 20 (Jean-Lesage), between Sainte-Julie and Beloeil
- Since March 22, work has resumed on the construction of a reserved lane on the A-20 East (Jean-Lesage), between Sainte-Julie and Beloeil. See the press release.
Interchange of highways 13 and 520 in Montreal and Dorval
- Over the next few months, major work will be carried out in the area of the interchange of highways 13 and 520 in Montreal and Dorval. See the press release.
In the event of adverse weather conditions or operational constraints, work may be cancelled or modified. Check the Quebec511.info regularly for current and upcoming obstructions.