Here are the Montreal-area weekend road closures

The southbound lanes on the Samuel De Champlain Bridge are closed on Aug. 22 and 23, 2026.

Drivers in and around Montreal should be aware that certain roads will be closed due to construction, including on the Samuel-De Champlain Bridge.

• LISTEN to CJAD 800 Radio for traffic updates every 15 minutes

Planning ahead before leaving is advised.

Samuel-De Champlain Bridge/Turcot Interchange

• From Friday at 11 p.m. to Monday at 5 a.m., Highway 15 South will be closed between Exit 63-O (Highway 20 West) on Highway 15 South (Décarie) at the Turcot Interchange in Montreal and the on-ramp from Route-132 to Highway 10 East in Brossard, including the Samuel-de-Champlain Bridge.

By default, the following will close at 9 p.m. on Highway 15 South:

• Access from Girouard Avenue.
• Access from de la Vérendrye Boulevard.

At 10 p.m., the following closures will be in place:

• Exit 68 (ramps to A-15 northbound and A-15 southbound) on Highway 20 eastbound.
• Access from Route-136 West to Highway 15 South.
• Highway 10 eastbound (Bonaventure), at Exit 4 (A-15, A-20).
• Exit 5 (Île-des-Sœurs).
• On Highway 15 South, access from Île-des-Sœurs Boulevard and René-Lévesque Boulevard (Île-des-Sœurs REM station).

Victoria Bridge/Route 112

• From Friday at 11 p.m. to Monday at 5 a.m., traffic heading toward the South Shore will use the single lane on the west span of the Victoria Bridge (Jacques-Cartier Bridge side).
• From Monday at 5 a.m. through Thursday, Sept. 10, the east span of the Victoria Bridge (Samuel-De Champlain Bridge side) will close, and traffic will be restricted to the single lane of the bridge’s west span (Jacques-Cartier Bridge side) on weekdays between midnight and noon towards Montreal and between noon and midnight on the South Shore bound side.

Jean-Lesage Highway (A-20)

• In Boucherville, from Friday at 11 p.m. to Monday at 5 a.m., Jean-Lesage Highway (A-20) will be closed between Exit 95 (De Montarville Boulevard) and the next on-ramp.

Montarville Boulevard South (Boucherville)

• From Friday at 10:30 p.m. to Monday at 5 a.m., De Montarville Boulevard heading south will be closed between Chemin de Touraine and the on-ramp to Highway 20 West.
• One lane will remain open between Ampère Street and Touraine Road to allow access to businesses. De Montarville Boulevard heading north will remain open.

Highway 25 South

• From Friday at 10:30 p.m. to Saturday at 8 a.m., Exit 4 (Montreal/Downtown) will be closed on Highway 25 South.

Souligny Avenue West

• From Friday at 11 p.m. to Thursday at 5 a.m., Souligny Avenue will be completely closed to westbound traffic between Honoré-Beaugrand Street and Highway 25 interchange.

Souligny Avenue East

• From Sunday at 11 p.m. to Monday at 5 a.m., Souligny Avenue will be completely closed to eastbound traffic between Dickson and Honoré-Beaugrand Streets.

Ville-Marie Tunnel (R-136)

• Until Friday, Aug. 28, at midnight, on the Ville-Marie Expressway (R-136) westbound in the Ville-Marie tunnel, one of two lanes will be closed at Exit 5 (A-10 West, Samuel-De Champlain Bridge, Robert-Bourassa Boulevard).

REM

• REM service will start at 7:30 a.m. on Saturday between Gare Central, Deux-Montagnes and Anse-à-l’Orme stations.

Highway 520 (Côte-de-Liesse)

• In Dorval, on Highway 520 West (Côte-de-Liesse), the southbound on-ramp from Roméo-Vachon Boulevard will be closed until Thursday, November 11, at midnight.

In the event of adverse weather conditions or operational constraints, the work may be cancelled or modified. Check Quebec511.info regularly for current and upcoming traffic disruptions.