The turmoil of the Turcot interchange

The huge construction site of the new Turcot Interchange has reached a critical point. Starting next Monday – and for months to come – motorists in the Montreal area will have plenty of time to assess their impact on their travel habits, while trying to extricate themselves from traffic jams or find the right path. to get to your destination.

The large 3.7 billion project is entering a “new phase” with the transfer of the Ville-Marie Expressway (A720 West) on temporary lanes, and the planned dismantling of seven bridges of the current interchange. The time has come to put away the GPS and to navigate by sight through Turcot, paying careful attention to the signs.

“It’s the change of phase that will most affect the habits of the users of the Turcot interchange because all the movements, all the highways will be affected,” said Sylvie Gervais, director of maintenance of mobility for KPH Turcot yesterday, the firm responsible for the works.

These changes in road configuration, which should come into effect next Monday, could be postponed by one week due to an ongoing investigation of a construction accident that occurred a week ago.


The most significant change for motorists will come as soon as next Monday with the complete closure of the Ville-Marie Highway (A720) in a westerly direction, from the Ville-Marie Tunnel to the Turcot Interchange. The traffic of the A720 West will be redirected, as soon as the exit of the tunnel, to two temporary lanes arranged against the new route 136. The confusion of the motorists in front of these deviations and the high volume of circulation, especially at the end of the day , could lead to traffic jams at the exit of downtown Montreal.

Since Highway 720 is closed, it is also necessary to condemn access. Thus, the entrances of the highway from the streets of Fort and Lucien-L’Allier, near the Bell Center, downtown, will be permanently closed. To compensate for these closures, and allow downtown traffic to flee towards the highway, a new temporary entrance will be built at the corner of St. Antoine and Rose-de-Lima. This entrance is expected to attract a lot of transit traffic around this intersection in the coming months, especially in the afternoon peak.

Construction of a multi-kilometer stretch of Highway 20, westbound, has been completed west of the interchange; it will therefore be open to traffic. Motorists coming from the city center will have direct access to it. However, major temporary improvements will be necessary to allow motorists coming from the Décarie Expressway (A15 South) or the Champlain Bridge to get to the Trudeau Airport or the West Island of Montreal.

Beginning on Monday, motorists coming from the Décarie Expressway will have to take the ramp to route 136 East, then turn right to a temporary structure that will take them up to Rue Saint-Rémi. From there, they will make a full turn to head west, via Pullman Boulevard, to Highway 20. Vehicles from the Champlain Bridge, via the A15 South, will converge on the same turn for take the west direction. The shoulder strap convergence zone represents a “risk of slowing down”.

Motorists arriving from the Champlain Bridge on Highway 15 North have not had direct access to Highway 20 West for weeks. A new temporary access to the highway will be offered. It will however require a lot of attention from motorists. While driving on the A15 North, coming from the Champlain Bridge, motorists will arrive at a fork and will have to choose to continue their route on the highway 15 towards the north of the island, or to take a right in a temporary entry towards Highway 20 West. In addition to the “decision point” with which the users of the A15 are not familiar, this link between the A15 North and the A20 West will converge at the same place as the traffic coming from the Décarie Expressway, and is also heading west of the island. The convergence of the two temporary links on Highway 15 is likely to cause traffic congestion.


The numerous deviations of the circulation on 28 temporary works will allow the beginning of works of dismantling of a very large scale. In addition to the elevated structures of Highway 720 West and several structures on Highway 20, in Montreal West, seven of the 12 ramps of the current Turcot Interchange will be demolished in 2018. The Deputy Director of KPH Turcot, Sébastien Marcoux, said that the structures to be demolished total 95,000 cubic meters of concrete. “This is double what we dismantled last year. The above illustration shows, in orange, the extent of demolition work planned for 2018 in the heart of the major interchange in southwestern Montréal.

It should be noted that the demolition work on Highway 720 West, even in an inhabited area, will continue until 11 pm on weekends. The week, they should end around 19 h. The structures will be irrigated permanently, using water cannon or snow, to contain the rising of dust.

Barriers of the weekend for the next six … (Image courtesy of the Department of Transport) – image 5.0
Weekend shackles for the next six months



This demolition will result in additional obstruction almost every weekend until spring 2018. Beginning in mid-December, Highway 136 will be closed in both directions, between downtown and the Turcot Interchange, all Weekends. Several closures planned by spring will extend from downtown Montreal to the Saint-Pierre interchange in the west of the island. On some occasions, there will remain only three ramps still open in the Turcot interchange, which has 12. More than 50% of the capacity of the interchange will be amputated during these closures.

Share Button