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Overnight Simcoe Street closure for 401 bridge works

The Ministry of Transportation (MTO) is replacing the Simcoe Street South and Albert Street overpass structures along Highway 401 in Oshawa.

As part of the construction operations, Simcoe Street South will be fully closed overnight from Bloor Street to Highway 401 westbound on-ramp, said a City of Oshawa statement.

The construction will include closing the Simcoe Street eastbound off-ramp. Reduced lanes will occur on Highway 401 beginning at 10 pm on both nights.

Simcoe Street closure:

  • Monday, November 27, 6 pm until 6 am Tuesday, November 28
  • Tuesday, November 28, 6 pm until 6 am Wednesday, November 29

Eastbound off-ramp closure:

  • Monday, November 27, 10 pm until 6 am Tuesday, November 28
  • Tuesday, November 28, 10 pm until 6 am Wednesday, November 29

The closure is to facilitate the installation of support beams (girders) for the replacement bridge structure.

During this period, both lanes of Simcoe Street will be closed from the westbound on-ramp south to Bloor Street. Access to the Highway 401 westbound on-ramp will still be available.

Southbound traffic on Simcoe Street will be detoured at First Avenue.

Northbound traffic will be detoured at Bloor Street.

Project information is available at

Map of the affected area

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