Autoroute 25

The Autoroute 25 project delivered a new highway and tolled bridge corridor linking Montréal and Laval, creating a continuous north–south connection across the Rivière des Prairies. It marked Québec’s first transportation public-private partnership and introduced the province’s first electronic toll road.

The 7.2-kilometre highway runs between Henri-Bourassa Boulevard in Montréal and the Autoroute 440/A-25 interchange in Laval. The A25 Bridge opened in May 2011, two months ahead of schedule. The customer service centre, situated on the Laval side, opened in February 2011.

The infrastructure includes a four-lane divided highway, multiple interchanges and overpasses, and a 1.2-kilometre six-lane bridge spanning the river. The bridge incorporates a multifunctional path for pedestrians and cyclists, while the corridor features a dedicated bus-only lane along most of its length.

Sustainability features

Taking into account a freshwater sturgeon habitat that is located in the deep portion of the river below, the Ministère planned for a cable-stayed section in order to minimize the need to build pillars. There was a maximum of nine pillars in the river.

The project incorporates preferential measures for public transit in the form of reserved bus lanes in Laval and in Montréal, and includes a multifunctional path for pedestrians and cyclists. These features contribute to the reduction of GHGs and the availability of the multifunctional path supports physical activity for users.

Design features

The A25 Bridge was the first cable-stayed bridge to be constructed in the province in more than 40 years. 

Local economic impacts

The link reduced pressure on existing river crossings, shortened travel distances for freight traffic and improved network resilience during peak periods. The project also strengthened economic integration between the two cities and provided a modern, multimodal crossing that balances road capacity, transit use and active transportation.