The Regional Municipality Of York


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Major Mackenzie Drive: Highway 400 to Highway 50

Transforming Major Mackenzie Drive

Photo Humber River Bridge construction west of Major Mackenzie Drive and Highway 27.

The Regional Municipality of York is transforming Major Mackenzie Drive from Highway 50 to Highway 400 in the City of Vaughan

Improvements include:

  • Widening Major Mackenzie Drive to six lanes
  • Installing a multi-use path, sidewalks and street lighting
  • Eliminating the jog at Major Mackenzie Drive and Highway 27 and building a 150-metre bridge over the Humber River
  • Building a bridge over the existing level crossing of the Canadian Pacific Railway tracks
  • Replacing old culverts and bridges with larger bridges
  • Installing wildlife fencing and wildlife culverts between Islington Avenue and Pine Valley Drive

Construction Update

Section 1: Pine Valley Drive to Highway 400

  • The project is complete

Section 2: Islington Avenue to Pine Valley Drive

  • Construction will begin once land has been acquired

Section 3: Canadian Pacifi c Railway tracks to Islington Avenue

  • Construction of the Humber River Bridge is underway. Starting mid-August, crews began digging and placing foundation supports. This work may be noisy, however will be done during daytime hours to minimize disruption. This process is expected to take up to two months to complete

Section 4: Highway 50 to Highway 427 extension

  • Construction is expected to begin in 2020

Graphic map showing road construction area highlighting the four sections on Major Mackenzie Drive. For a detailed description of this map please call 1 877 464 9675 extension 75923.

York Region will make every effort to minimize disruptions. Thank you for your ongoing patience.


For everyone’s safety, please reduce your speed through the construction area. Please contact us if you notice any safety issues in and around the construction sites.

For everyone's safety, please reduce your speed through the construction areas.

Transit services

For inquiries about transit routes during construction, riders are encouraged to visit or call 1-866-MOVE-YRT (668-3978).

We're here to answer your questions. Accessible formats of this newsletter or communication supports are also available upon request.

General Inquiries:
Lindsey Adlam
Communications and Community Engagement Specialist, York Region
Office: 1-877-464-9675, ext. 75923

Construction Activity:
Gary Leonard
Construction Administrator, York Region
Office: 1-877-464-9675, ext. 75233

After hours emergency: 1-877-464-9675 ext. 75200

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