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Underpass

Dougall Pedestrian Underpass and Multi-Use Trail

Client: The City of Windsor
Completed: 2020
Project Value: $7 MILLION

As part of the City of Windsor’s planned transportation improvements, Amico was selected through a competitive bid process, by the City to design and build a pedestrian underpass and multi-use trail along Dougall Avenue from just south of the Ouellette Place intersection, to the South Cameron Boulevard intersection. This section of road has been known for its tight confines due to the CN railway overpass, and has historically made it nearly impossible for pedestrians or cyclists to find a safe way through the high-traffic, north-south road corridor. 

The pedestrian underpass that crosses under the rail corridor is a 3×5 m precast concrete box section with cast-in-place concrete U-shaped portals leading into and out of the tunnel within the CN Rail right-of-way. This tunnel will be designed for a service life of 100 years and open cut methodology was used for the tunnel construction. The multi-use trail is approximately 425 m in length along an alignment that is parallel to the west curb line along southbound Dougall Avenue, up to the location of the future extension of Northwood Street. 

The project included many challenges, including coordinating with CN Rail for a 48-hour shutdown period, complex traffic management and tight site constraints. The whirlwind weekend shutdown included the excavation, CN track removal, installation of 20 precast tunnel sections and then backfill and re-installation of the 110’ section of tracks. Some key design elements of the project include a textured retaining wall, several landscaping details including armour stone, and an anti-graffiti coating of the retaining wall and interior of the tunnel.