Road closures planned for this weekend in and around Montreal will cause major traffic disruptions, including on the Honoré-Mercier Bridge, where a fissure was discovered, Quebec’s transport ministry says. Drivers are encouraged to plan their movements accordingly. Here are the closures announced for the weekend. Honoré-Mercier Bridge / Route 138 From Saturday 3 a.m. to Monday 5 a.m., one lane in each direction will remain open. Access from Airlie Street towards Route 138 west remains open. Laurentides interchange / A-15 / A-40 From Friday 10 p.m. to Monday at 5 a.m., in Montreal, at the Laurentides Interchange, on the service lane of the A-15 southbound, the road leading to Rockland Road / Marcel-Laurin Boulevard will be closed. Highway 10 / Bonaventure From Saturday at 5 a.m. to Monday at 5 a.m., on the A-10 East (Bonaventure), towards the Samuel-De Champlain Bridge, partial closure of one in two lanes between exits 4 (A-15, A-20) and 5 (Île-des-Soeurs). Highway 15 / Samuel-de Champlain Bridge north-bound On Sunday from 6 a.m. to 6 p.m., on the Samuel-De Champlain Bridge heading north (towards Montreal) between the R-132 at Brossard and Île-des-Soeurs, partial closure of the left-hand lane. Traffic may use the shoulder. Highway 25 / Louis-Hippolyte-La Fontaine bridge-tunnel southbound From Friday at 11 p.m. to Saturday at 8 a.m., complete closure of the tunnel between Exit 5 (Sherbrooke Street) in Montreal and the R-132 in Longueuil. Avenue Souligny will be closed from 10:30 p.m. on Friday, between Dickson and Honoré-Beaugrand Streets. Highway 25 / Louis-Hippolyte-La Fontaine bridge-tunnel northbound From Friday at 11 p.m. to Saturday at 8 a.m., complete closure of the tunnel between Exit 90 (R-132) on the A-20 west at Longueuil and the access from Sherbrooke Street East in Montreal. Route 132 / René-Lévesque Boulevard From Friday at 10 p.m. to Monday at 5 a.m.. in Longueuil, on the R-132 (René-Lévesque) in both directions, complete closure of junction 85 (Boulevard Roland-Therrien). Route 158 / Sir-Wilfrid-Laurier Road From Friday at 9 p.m. to Monday at 5 a.m., in Mirabel, on the R-158 (Sir-Wilfrid-Laurier Road), complete closure in both directions between the A-15 (des Laurentides) and Chemin Saint-Simon. Route 337 / Chemin Gascon From Friday at 6 a.m. to Sunday at 10 p.m., in Terrebonne, on the R-337 (Chemin Gascon) heading north, complete closure between the A-640 West service road and Rue Chayer. Réseau express métropolitain (REM) Planned work on the network will result in a delayed start to services on Oct. 17 and 18. Victoria Bridge Due to ongoing work on Rue Bridge for an as yet undetermined period, the Victoria Bridge will remain configured with a single lane in each direction at all times until Rue Bridge reopens fully. Rue Ouimet in Vaudreuil-Dorion On Rue Ouimet in Vaudreuil-Dorion, between Boulevard de la Cité-des-Jeunes and Chemin Paul-Gérin-Lajoie, the bridge over the River Quinchien will be closed in both directions on Saturday from 8.00 am to 4.00 pm. Diversion via Rue Jeannotte and Avenue Saint-Charles. Route 134 (Boulevard Taschereau) in Brossard Until mid-October, contraflow traffic will be in place in the evenings and at night on Route 134 (Boulevard Taschereau), between Avenue Panama/Auteuil and Boulevard Matte, in Brossard. Cross streets will be closed and a detour will be in place. These restrictions are necessary to resurface various junctions on Route 134. A-13 / A-520 Interchange Night-time closures will be in place in Montreal on the A-13 (Chomedey), at the junction with the A-520 (Côte-de-Liesse), until 2 November 2026. Highway 520 (Côte-de-Liesse) In Dorval, on the A-520 westbound (Côte-de-Liesse), the access ramp from Roméo-Vachon Boulevard heading south will be closed until Nov. 11 at 11:59 p.m. The transport ministry says that 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.
