Montreal road closures and construction: 42 major projects planned for fall 2026

Montreal drivers, prepare: there are 42 major construction projects guaranteed to disrupt traffic this fall.

Montreal drivers will face major traffic disruptions this fall as over 40 construction projects are planned across the metropolitan area, including four new projects.

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Why is traffic so bad in Montreal?

Mobility Montréal announced the main construction sites expected to affect traffic during fall 2026, warning that roadwork, infrastructure upgrades and major events will have an impact on travel across the region.

Officials say the work is necessary to maintain, repair and upgrade transportation infrastructure, but drivers should expect delays, road closures and detours in several key areas.

Where will Montreal traffic be worst this fall?

Of the 52 major construction projects announced last spring, 14 have now been completed. Recent completed work includes:

• Repairs to overpasses, as well as paving and drainage work on Highway 640 between Sainte-Marthe-sur-le-Lac and Blainville, carried out by the Ministère des Transports et de la Mobilité durable.
  
  
• Infrastructure work on Saint-Denis Street in the CHUM area, carried out by the City of Montreal.
  
  
• Infrastructure work on Airport Road in Longueuil, carried out by the City of Longueuil.
  
  
• The 42 active projects will not all create disruptions at the same time. Construction will be spread throughout the coming months, with some work scheduled overnight and on weekends to reduce the impact on traffic.

Mobility Montréal says its partners are coordinating construction schedules to avoid closing several strategic roads at the same time whenever possible.

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1. Southwest Montreal

The southwest of the island will be one of the areas to watch, with construction affecting the Victoria Bridge and its approaches, as well as Bridge Street.

Work is also underway on Highway 10, the Bonaventure Expressway, while occasional overnight closures are planned for Highway 136, including the Ville-Marie and Viger tunnels.

A complete closure of the northbound Samuel De Champlain Bridge is also planned for the weekend of August 28.

2. Downtown Montreal

Several construction sites will continue across downtown Montreal, including sewer rehabilitation work on Guy Street and infrastructure work around the Berri-UQAM metro station.

3. Central and East Montreal

Major projects will continue in central and eastern parts of the island, including repairs to the Louis-Hippolyte-La Fontaine Tunnel, the extension of the Blue Line, and repairs to the Papineau Street underpass between Rosemont Boulevard and Saint-Grégoire Street.

Drivers can find details about planned road closures and construction-related traffic disruptions on the Mobility Montréal website.

Will there be any road closures for the 2026 UCI World Championships in Montreal?

The UCI Road World Championships Montreal 2026 will take place in September, bringing additional major road closures across Montreal's municipal and highway networks.

Among the planned closures:

• Highway 10 (Bonaventure Expressway): Complete closure toward downtown on September 19, 20, 21 and 22, from 6:30 a.m. to 4:30 p.m.
  
  
• Samuel De Champlain Bridge: Complete closure toward Montreal on the mornings of September 26 and 27.
  
  
• Additional closures before and during the championships are available through the event's interactive maps and Québec 511.

The public is encouraged to plan ahead and use public transit or active transportation whenever possible. A special World Cycling ticket, All modes ABC, will also be available during the championships.

Free park-and-ride option during the World Championships

To make getting around easier on September 21 and 22, a free park-and-ride lot will be available at the Chevrier parking lot in Brossard.

Free shuttles will connect the parking lot with the Du Quartier REM station from 6 a.m. to 10 a.m. and again from 3:30 p.m. to 7 p.m.

The goal is to encourage commuters to use public transit and reduce the impact of road closures during the cycling championships.

How bad will Montreal traffic be this fall?

While construction projects and major road closures are unavoidable, Mobility Montréal says coordination between its partners is helping reduce the number of simultaneous disruptions.

More than 345 traffic obstructions were avoided this spring and summer through coordination between the organization's partners.

Mobility Montréal is made up of around 20 partners working together to limit the impact of construction sites on traffic across the Montreal metropolitan area.

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Meanwhile, the Réseau de transport de Longueuil's new 901-Taschereau bus route is now in service, offering more direct trips along Taschereau Boulevard.

The route marks the launch of the BUS+ program, which aims to make bus travel more efficient and attractive across the metropolitan region as part of the ARTM's Strategic Development Plan.

For Montreal drivers, however, the message for fall is simple: plan ahead, check road conditions before leaving and expect extra time behind the wheel.

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