Traffic delays expected as Montreal sees more bridge, highway closures over weekend

Posted June 30, 2025 5:48 pm.
Last Updated July 3, 2025 6:17 pm.
Montrealers can expect more traffic delays over the upcoming weekend.
The Ministère des Transports et de la Mobilité durable says various road and lane closures will be taking place, including the Honoré Mercier Bridge, Highway 25, and Highway 10.
Highway 25
Highway 25 will be fully closed around the Louis-Hippolyte-La Fontaine tunnel Friday night.
Highway 25 toward Montreal between exit 90 and the entrance from Hochelaga Street will be completely closed between Friday 11 p.m. until Saturday 8 a.m.

During the same time period, Highway 25 toward the South Shore between exit 5 and the entrance from Charron Island will also be completely closed.
Transports Québec says the highway will be closed 30 minutes prior to the full closure.
This closure is to allow for work to be done to the tunnel’s electrical and communication systems.

Honoré Mercier Bridge
The Honoré Mercier Bridge will be reduced to one lane in each direction over the coming weekend.
The lane closures will start at Friday at 11 p.m. and will last until Monday at 5 a.m. for repair work to be conducted on steel elements of the bridge.

Highway 10
Highway 10 between Highways 15 and 20 and Route 132 will also see closures over the weekend.
Starting Friday at 11 p.m., the ramp leading from Highway 10 westbound to Highway 20 / Route 132 eastbound (towards Varennes) and Highway 15 southbound / Route 132 westbound (towards La Prairie) will be closed until Saturday at 6 a.m.

Additionally, starting Saturday at 6 a.m., and lasting until Monday, the ramp leading from Highway 10 westbound to Highway 20 / Route 132 eastbound (towards Varennes) will be fully closed.
This work is to allow for paving to be conducted between Brossard and Saint-Lambert.
Additional closures
Thursday, Transport Quebec said additional areas would see partial or full closures over the weekend.
From 7 p.m. on Saturday until 10 a.m. on Sunday, between Senneville (Island of Montreal) and Vaudreuil-Dorion, there will be a single lane closure on the Île-aux-Tourtes bridge, spanning Lac des Deux Montagnes.
Highway 30 will also see a lane reduction on the Serge-Marcil Bridge between Salaberry-de-Valleyfield and Les Cèdres between 6 a.m. and 8 p.m. on Saturday and Sunday.
Côte-de-Liesse Road East will see a complete closure between A-40 East and the Décarie interchange, from 10 p.m. on Friday until 5 a.m. on Monday.
Additionally, there will also be a partial lane closure on Côte-de-Liesse Road East at Lucerne Road from 9 p.m. on Friday until 5 a.m. on Tuesday, and a partial closure on Lucerne Road between Glengarry Avenue and Côte-de-Liesse Road East during the same timeframe.
Côte-de-Liesse Road East will also have two of three lanes closed upstream of Rockland Road until November.
Jean-Milot Street will also be closed in both directions between Lafleur Avenue and Newman Boulevard until July 11.
Additionally, there will be closures for the International des Feux Loto-Quebec.
The Jacques Cartier Bridge will be fully closed on Thursday, July 3, and Sunday, July 6, from 8 p.m. to 11:59 p.m.
R-136 East will also see a closure along the Ville-Marie Tunnel between Exit 4 — A-10, Victoria Bridge, Robert-Bourassa Boulevard, de la Montagne Street — and Panet Street, Thursday, July 3 and Sunday, July 6, from 8 p.m. to 5 a.m. the following day.
The Victoria Bridge will also see lane changes, as two lanes will become available toward the South Shore on Thursday afternoon to accommodate for rush hour traffic, and will last until 11:30 p.m. It will also be this way on Sunday from 8 p.m. to 11:30 p.m.