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Long-term Gardiner Expressway construction affects GO bus service, starting July 27



Update — Friday, August 28, 7:53 a.m. — Bridge work for the project restricts north-south through traffic at the intersection of Lake Shore Boulevard East and Parliament Street from Saturday, August 29 until Monday, August 31. The TTC is detouring buses.


Update — Friday, August 21, 6:57 a.m.: Bridge work near Lake Shore East / Parliament and the resulting TTC detour continue until August 24.


Update — Monday, August 10, 9:35 p.m.: Bridge work near Lake Shore East / Parliament and the resulting TTC detour continue until August 22.


Update — Monday, August 3, 8:35 a.m. — Bridge work for the project restricts turns through the intersection of Lake Shore Boulevard East and Parliament Street from Tuesday, August 4 until Tuesday, August 11. The TTC is detouring buses.


Starting 5 a.m. Monday, July 27, the City of Toronto starts the fourth and final phase of its project to fully replace the concrete deck and steel girders

  • on the Frederick G. Gardiner Expressway between Lower Jarvis and Cherry Streets.

This weekend, from 12:01 a.m. Saturday, July 25 until 5 a.m. Monday, the City closes the expressway to all traffic between the Don Valley Parkway and York Street, while crews shift the work zone to the south half of the roadway and reopen the north half. Also, at 12:01 a.m. Sunday, July 26, the City reopens the westbound off-ramp from the expressway to Yonge, Bay and York Streets.

During this phase of construction, the work zone restricts the expressway to just two lanes in each direction on the newly rebuilt north half of the expressway between the DVP and York.

To maintain safety during the construction, the City is reducing the speed limit on the expressway through the work zone will. Motorists can also expect off-peak lane closures on Lake Shore Boulevard East between Lower Jarvis and Parliament Streets, so crews can safely remove and replace sections of the expressway deck directly above.

Closing traffic lanes and reducing the speed limit on the expressway directly impacts GO Transit bus service. Passengers aboard buses along these routes can expect detours or delays:

  • 61 Richmond Hill / Toronto;
  • 63 King City / Toronto;
  • 65 East Gwillimbury / Newmarket / Toronto;
  • 71 Stouffville / Toronto; and
  • 90 Lakeshore East.

GO Transit Control will monitor traffic conditions and advise GO drivers about the best route to reach their destinations.


To complete this work faster and to be less disruptive to the public, the City is using an innovative construction technique, accelerated bridge construction, to replace the expressway concrete deck and steel girders. This technique involves pre-fabricating the new sections of the expressway, or panels, off-site and transferring the new panels into place where crews have already removed older sections. This method results in less dust and noise and can reduce construction time by as much as 40 per cent over traditional methods.

This accelerated bridge construction project is significant due to the scale of the work with the complexities of the work zone in an urban centre, near buildings and over a major arterial road.

Crews work mostly 24 hours a day, seven days a week to accelerate and reduce the construction timeline. They should complete most of the disruptive work should by 11 p.m.; however, in some instances, they may perform disruptive work overnight for the safety of crews and the travelling public.

The City is changing traffic-signal timing to enhance traffic flow on nearby routes and help reduce traffic congestion on and near the expressway.


The section of the Gardiner Expressway is nearing the end of its service life. This vital work is part of the Gardiner Expressway Strategic Rehabilitation Plan. The plan addresses the immediate and long-term rehabilitation needs of the entire expressway, from Highway 427 to the Don Valley Parkway, to make sure it remains in a safe and operable condition now and in the future.

The City expects to complete the entire project in 2021.