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Adding More Lanes to Highway 400 to Keep People Moving

Archived News Release

Adding More Lanes to Highway 400 to Keep People Moving

Ontario Creating Jobs and Improving Traffic Flow for Commuters and Families

Ministry of Transportation

Ontario is creating jobs and keeping people moving by widening more than 10 kilometres of Highway 400 from Major Mackenzie Drive in Vaughan to King Road in the Township of King.  

Transportation Minister Steven Del Duca and Helena Jaczek, MPP for Oak Ridges-Markham, were in King City today to announce the start of construction of the Highway 400 widening project. This project, which is scheduled for completion in fall 2020 will widen the highway from six lanes to eight lanes and include a High Occupancy Vehicle (HOV) lane in each direction.

Ontario is making the largest infrastructure investment in hospitals, schools, public transit, roads and bridges in the province's history. To learn more about what's happening in your community, go to Ontario.ca/BuildON.

Improving key transportation infrastructure to keep people moving is part of our plan to create jobs, grow our economy and help people in their everyday lives.

Quick Facts

  • Ontario is investing $89.9 million in this project.
  • Widening of Highway 400 will create or sustain approximately 629 construction jobs.
  • The average daily traffic for this section of Highway 400 is approximately 122,500 vehicles per day.
  • Ontario is committing over $2.1 billion to repair and expand provincial highways and bridges across the province.

Additional Resources


“Improving our highway infrastructure is vital to Ontario’s economy. This stretch of highway is already very busy for residents and businesses. Adding new lanes will help keep traffic moving so that businesses can continue to operate and people get where they need to be sooner.”

Steven Del Duca

Minister of Transportation

“I am proud that the provincial government continues to invest in much needed infrastructure improvements in York Region. Widening Highway 400 and adding HOV lanes will improve travel times for families, commuters and businesses in Oak Ridges-Markham.”

Helena Jaczek

MPP for Oak Ridges-Markham

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