There will be some challenges this weekend driving through the Turcot Interchange, and around the city as the Montreal Marathon is on.

There won't be any access to the Ville-Marie or Highway 20 from the Decarie Expressway, and you won't be able to get to Decarie from Highway 20.

The Oasis Rock 'N' Roll Montreal Marathon is happening Saturday and Sunday causing closures throughout the city.

Here are the details:

Mercier Bridge
Friday 11 p.m. to Monday 5 a.m.

Complete closure of the bridge towards Montreal and backflow on the bridge towards Kahnawake, one lane per direction. The entrance to Airlie Street remains open.

Victoria Bridge

Open towards the South Shore only, from Saturday 6 a.m. to Sunday 4 a.m. Then back to normal, one lane in each direction

Turcot Interchange
Friday 23:59 p.m. to Monday 5 a.m.

Closures of the following exits:

  • The ramp from Highway 15 south to Highway 20 west to Lachine, Dorval
    Detour: via the ramp for Highway 15 south, exit 61 for Atwater south, then Joseph, Dupuis, Lesage, Church, De La Vérendrye and Highway 15 north
  • The ramp from Highway 15 south to Routh 136 / Highway 720 east (to downtown)
    Detour: via the ramp for Highway 15 south, then for:
    Cars: Exit 61 for Atwater, Saint-Jacques, de la Cathédrale and entrance for Route 136 / Highway 720 East
    Trucks: Exit 60 for Highway 10 west (Bonaventure), Exit 2 (Pierre-Dupuy), Chemin des Moulins, Riverside, Mill, Commune, McGill and William, Robert-Bourassa and the entrance for Route 136 / Highway 720 east or St-Antoine east
  • The ramp from Highway 20 east to Highway 15 north
    Detour: via the ramp for Highway 15 south, exit 61 for Atwater South, then Joseph, Dupuis, Lesage, Church, De La Vérendrye and Highway 15 north
  • Partial closure of one out of two lanes in the ramp from Highway 20 east to Route 136 / Highway 720 east (to downtown)
  • Route 136 east (Highway 720), Exit 2 closure (Atwater Avenue)
    Detour: via exit 3 (Guy), René-Lévesque East, de la Cathédrale and St-Antoine West

Highway 10 (Bonaventure)
Friday at 11 p.m. to Monday at 5 a.m. 

  • Complete closure of Highway 10 east (towards Samuel-De Champlain Bridge) between Wellington at the Carrie-Derick entrance
    Detour via Nazareth, Wellington, Bridge, des Irlandais and Carrie-Derick 
  • Complete closure Highway 10 west (toward downtown) between Exit 2 (Pierre-Dupuy, Montreal Casino) and Wellington
    Detour via des Moulins, Riverside, Mill, de la Commune, McGill et William and Robert-Bourassa. Police will be there to facilitate traffic in the area. 
  • Complete closure of Highway 10 east between Exit 4 (Highway 15, Gaetan-Laberge) et Nuns' Island
    Detour in the exit via Gaétan-Laberge. For more details, visit SSL

Turcot Project / local network

  • Closure of the section of Notre-Dame west between Monk and Carillon from Saturday at 10 a.m. to Monday 5 a.m.
    Detour Cote-St-Paul (one lane each direction)
  • Closure of Ste-Anne-de-Bellevue Blvd., between Saint-Jacques and Angrignon, including between Highway 20 West, from Friday at 11:59 p.m. to Monday at 5 a.m.
    From Notre-Dame west: via Saint-Pierre (trucks via Dollard Ave.) et Saint-Jacques / Avon
    From Highway 20 west / exit 65: via Angrignon and follow the detour in place
    Toward Highway 20 west: via Saint-Jacques / Avon and Montréal-Toronto
    Toward the Mercier Bridge: via Saint-Jacques / Avon and Montréal-Toronto, make a U-Turn at 1st Avenue at Route 138 west
    Toward Highway 20 east and Angrignon: via Saint-Jacques / Avon, Dollard and Notre-Dame
  • Note: local traffic allowed from Saint-Jacques street to access the shops

Highway 30 
Friday at 3 p.m. to Monday at 5 a.m.

  • Closure of Highway 30 east at Varennes and at Verchères between Kms 100 and 108, and backflow, one lane each direction
  • Default closures: Eastbound, starting at 2 p.m. exits 105 (Vercheres, Calixa-Lavallee) et 107 (Calixa-Lavallee, Labonté)  
    Detour : via Exit 113 (Lapierre), make a U-turn at Highway 30 west
    The entrances for Calixa-Lavallée and Labonté / Chicoine-Larose 
    Detour: via Highway 30 west and do a U-turn at Exit 98 (de la Baronnie)

Montreal Marathon 

Ste. Catherine St. and de Maisonneuve Blvd. at the corner of Clark St. will be closed along with St. Denis and Berri Streets.

The Sunday marathon and half-marathon will start just after 7 a.m. at the corner of Rene-Levesque Blvd. and St. Urbain St. and runners head east. Closures will happen on Hochelaga, Rachel, Ontario, Notre-Dame and Berri Streets and other smaller streets in the area.

For all the detours, visit the marathon siteMarathon mapPredicted:

Paving and repair work is set to begin on Highway 25 between Longueuil and Montreal on Sept.23, including the La Fontaine tunnel. This work, carried out at night, seven days a week, will continue until the middle of November. About 15 partial closures and close to a dozen complete closures will be required in each direction. More details here

Also starting Sept. 23, a redirection will be set up on the Île-aux-Tourtes Bridge (Highway 40) between Vaudreuil-Dorion and Senneville until spring 2020.

  • Rush-hour traffic management:
    East (towards Montreal): Three lanes open between 4 a.m. and 11 a.m.
    West (towards Vaudreuil-Dorion) : Three lanes open between 1 p.m. and 2 a.m.
    Outside of these hours, two lanes will be open in each direction

Partial night and weekend closures will also be required during construction. More details here

In case of inclement weather, the closures could be modified or cancelled.

Check out for current and upcoming roadblocks on the network.