Highway 401 overpasses being replaced in Oshawa, Ontario

The Ontario government has awarded a contract to Dufferin Construction to replace the Park Road and Cubert Street overpasses in Oshawa to accommodate the future widening of Highway 401 to ten lanes.

The overpass replacements project will support hundreds of jobs during construction in the engineering, construction and supply chain industries and are part of the province’s nearly $30 billion plan to build, expand and repair highways, roads and bridges to help keep workers on the job in the face of U.S. tariffs and economic uncertainty.

“Our government is investing billions of dollars in highway infrastructure that will support our growing population and keep vehicles moving,” said Ric Bresee, Parliamentary Assistant to the Minister of Transportation. “Replacing Highway 401 overpasses in Oshawa is a critical step in our plan to widen the 401 so we can tackle gridlock, grow our economy in the face of unprecedented tariffs, and support the drivers and businesses who rely on this highway every day.”

The contract also includes resurfacing the eastbound lanes of Highway 401 from east of Harmony Road to Courtice Road.

Oshawa Mayor Dan Carter called the project a “major milestone” for the city. “The replacement of the Park Road and Cubert Street overpasses is more than just infrastructure – it’s a strategic investment in our city’s future. As Oshawa continues to grow, this project will help support local businesses, create good-paying jobs and strengthen our economy as a whole.”

More than 10,000 trucks use Highway 401 each day, transporting $380 million worth of goods and according to a report from the Canadian Centre for Economic Analysis, gridlock costs Ontario’s economy as much as $56 billion each year.

“Reducing gridlock on the 401 is essential for families and businesses,” said Whitby MPP Lorne Coe. “By replacing overpasses and expanding lanes … this project will not only improve daily commutes but also help create a future of better roads and stronger communities.”

Construction is currently underway and is expected to be completed by the fall of 2028, part of broader plans to replace multiple overpasses in Oshawa including those at Albert Street, Simcoe Street and Wilson Road.