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Part of Highway 401 to be fully closed coming weekend

The City of Oshawa yet again announced a full closure of Highway 401 in both directions as part of the construction operations to replace overpass structures along the highway in Oshawa.

The full closure will be from Simcoe Street to Drew Street to perform bridge demolition on the existing Albert Street overpass at Highway 401.

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

The closure will take place on Saturday, June 15 at 11 pm until Sunday, June 16 at 7 am with some lane closures starting Saturday, June 15 at 9 pm to be fully reopened by Sunday, June 16 at 9 am.

During this period, detour routes will be implemented to divert the vehicle traffic around the closed portion of the highway by utilizing the existing arterial roads. These detour routes are summarized as follows:

  • Eastbound Traffic on Highway 401: All lanes of traffic will exit at the Simcoe Street off-ramp (East/West) and follow Bloor St. eastbound until reaching the next available Highway 401 on-ramp located west of Fourth Ave.
  • Westbound Traffic on Highway 401: All lanes of traffic will exit at the Drew Street off-ramp, proceed north to the intersection of First Avenue and Drew Street, and then follow First Avenue westbound to Simcoe Street. From there, traffic will travel southbound towards the Simcoe Street on-ramp to access Highway 401 westbound.

Additionally, the following arterial roads will be closed with permitted access to the local traffic and immediate residents. These closures are as follows:

  • Simcoe Street South: Closed from 150m north of Lviv Blvd. to Bloor Street East/West.
  • Albert Street: Closed from Third Avenue to Bloor Street East/West.
  • Front Street: Closed from Third Avenue to Lviv Blvd.
  • Lviv Blvd: Closed from Simcoe Street to Front Street.

Project information is available at

a map of the detour route for Hwy. 401 June 15 and 16

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