Major infrastructure and transit improvements are coming to Hurontario Street with the construction of the Hazel McCallion Line. An important part of this construction is a new elevated guideway that will cross over Highway 403. 

If you’ve driven on Highway 403 near Square One, or passed over the nearby Hurontario Street bridge, you may have noticed the large concrete structures.  

Those are the building blocks for a new elevated guideway that will see trains run overtop the busy highway.  

It’s a key part of the 18 km light rail transit (LRT) project that will run from Port Credit in south Mississauga to Brampton Gateway Terminal at Steeles Avenue, connecting to other transit systems and routes in Peel Region including MiWay, Brampton Transit and GO Transit. 

Elevated guideway progress 

After successfully putting up the vertical supports, crews recently installed the horizontal girders over the eastbound lanes of Highway 403.  

Lifting four massive pieces of concrete weighing a combined 248 tonnes takes a lot of careful planning. 

Because of their sheer size, it took a large crew of trucks, cranes and workers to get them in place. With safety at the forefront, eastbound lanes of the highway were temporarily closed to get the beams installed.  

The operation was safely coordinated with Ministry of Transportation and the Ontario Provincial Police.   

Benefits of the elevated guideway 

Once the project is completed, the elevated section will create a dedicated path for the LRT over Highway 403, providing the ability to support rapid transit with reduced impact to local traffic, and being a visually appealing piece of an urban infrastructure. 

The next step in this part of the project will see crews move over to the westbound lanes of the 403 to install four more girders.  

For the latest on the project, check out the Hazel McCallion Line on social media or head to the project’s dedicated webpage.  

Originally published: April 2023 

Last updated: July 2024