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Some major road closures to note this weekend:
Highway 19
The Papineau-Leblanc Bridge, connecting Laval and Montreal, will be closed in both directions from 10 p.m. Friday to 4:30 a.m. Monday — northbound between Henri-Bourassa Blvd. and de la Concorde Blvd., and southbound from Highway 440 to Henri-Bourassa Blvd. The southbound service road will remain open toward St-Martin Blvd.
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Mercier Bridge
Between 10 p.m. Friday and 11 a.m. Saturday, the upstream span of the Mercier Bridge will be closed, with traffic sharing the other span with one lane in each direction. The entrance from Airlie St. will be closed during this time.
Highway 20
In Lachine, the westbound entrance from 1st Ave. will be closed from 10 p.m. Friday to 1 p.m. Sunday for work by a private company. Suggested detour is via Angrignon Blvd.
Route 116
The highway will be completely closed eastbound between Highway 30 and Seigneurial Blvd., from 8 p.m. Friday to 9 a.m. Saturday and from 7 p.m. Sunday to 6 a.m. Monday.
Route 134
In Longueuil, the entrance to Taschereau Blvd. eastbound from St-Charles St. west is closed between 9:30 p.m. Friday and 5 a.m. Monday, for asphalt work.
Montreal streets
- Marcel-Laurin Blvd. (Route 117) will be closed in both directions between Décarie Blvd. and St-Louis St. in St-Laurent between 9 p.m. Friday and 5 a.m. Monday.
- Pie-IX Blvd. (Route 125) will have two of three lanes closed southbound at Gouin Blvd., which will prevent left turns toward Henri-Bourassa Blvd. eastbound, from 9 p.m. Friday to 9 a.m. Saturday, 7 p.m. Saturday to 10 a.m. Sunday and 8 p.m. Sunday to 5 a.m. Monday.
- Viger Ave. is closed between Sanguinet St. and Hôtel-de-Ville Ave. until Monday.
- St-Antoine St. is closed between Agnès and St-Ferdinand Sts. in the Sud-Ouest borough until fall 2026. The street’s direction is reversed, allowing traffic eastbound only between Rose-de-Lima St. and Atwater Ave. Between Rose-de-Lima and Agnès, traffic circulates in both directions.
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Réseau Express Métropolitain
A systems update will delay the start of service on the REM Saturday and Sunday to 7:30 a.m. Shuttle buses are available between 5:30 and 7:30 a.m.
Upcoming
- Highway 40: Work to replace the concrete slabs on the Metropolitan Expressway begins on Monday, continuing until fall. This will require complete closures of the highway overnights and service roads on nights and weekends, particularly around the Décarie Interchange.
- Highway 20: In Dorval, the ramp from Sources Blvd. south to Highway 20 east will be closed from June 21 until the end of August, as will the ramp that connects the northbound and southbound lanes on Sources. The pedestrian overpass is closed until the beginning of October.
Ongoing disruptions
- Highway 10: The Bonaventure Expressway has two lanes in each direction between the Peel Basin and Victoria Bridge until Aug. 15. Exit 3 (Carrie-Derick St.) eastbound is closed.
- Highway 15: In Laval, asphalt and repair work is being done between Médéric-Martin Bridge, which connects to Montreal, and Cartier Blvd. Three of four lanes will be closed in one direction at a time overnights until July.
- Highway 40: The Île-aux-Tourtes Bridge is down to three lanes — one in each direction, and one lane that switches directions on weekdays. During the weekends, the extra lane is for traffic to Vaudreuil-Dorion.
- Highway 40: In Baie-D’Urfé and Kirkland, reconstruction work on the eastbound highway between Morgan and St-Charles Blvds. will disrupt traffic with partial closures overnights.
- Highway 40: In Town of Mount Royal, the Côte-de-Liesse Rd. service road is partly closed eastbound between Sunset and Athlone Rds. until July.
- Highway 50: In Mirabel, work to replace lighting systems and asphalt between Route 117 and Louis-Bisson St. requires complete closures overnights of the westbound highway until fall.
- Route 136: The Guy St. exit eastbound is closed until the fall.
- Highway 440: In Laval, asphalt work is being done on the eastbound service road between Highway 13 and Industriel Blvd., overnight between 10 p.m. and 5 a.m., affecting entrances and exits, until the winter.
- Highway 520: The highway is closed in both directions at Hickmore St., with traffic detoured via the service roads, until the end of the year.
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