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Simcoe Street South Oshawa bridge construction: GO, DRT detours, starting January 3 and 12



Update — Friday, July 10, 7:55 a.m.: Starting Monday, July 13, DRT revises the detour paths for its buses, due to construction on Park Road South.


Bowmanville extension header.jpg

Metrolinx is extending GO Transit’s 09 Lakeshore East line to Bowmanville, as part of the GO Expansion Program.


Metrolinx has started “early-works” construction for the Bowmanville extension project. It’s replacing the Simcoe Street Bridge over the Canadian Pacific Kansas City Railway (CPKC) Belleville subdivision tracks in Oshawa. The bridge is more than 100 years old and nearing the end of its service life. The new bridge will be higher and longer and Metrolinx will realign it “to meet current engineering standards.” It’s also expanding the rail corridor in the area and adding a new GO train track.

GO_Expansion_Oshawa_simcoe_street_bridge_photo-3.jpg

^ An aerial view of where the work will be taking place. Image, Metrolinx

Starting Monday, January 12, the Region of Durham is closing:

  • Simcoe Street South [Regional Road 2] between Avenue and Albany streets

in the City of Oshawa to accommodate the work.

Simcoe South bridge construction.jpg

Metrolinx explains that “This closure is necessary to ensure the safety of both the public and crews as they work on multiple construction activities,” including:

  • demolishing and removing the old bridge structure;
  • installing new foundations and piling to support the new bridge; and
  • completing other road and utility works resulting from the project.

Durham Region Transit is detouring buses along these routes, while the street is closed:

2026_01_12_Simcoe-Bridge-Construction_901-N2_via-Park_Reviewed3.png

GO Transit started detouring its buses Saturday, January 3 to prepare its passengers for the construction. GO buses along these routes are detouring:

  • 52 Oshawa / Vaughan;
  • 56 Oshawa / Oakville; and
  • 92 Oshawa / Yorkdale.

Construction of the Simcoe Street South bridge and the resulting DRT and GO detours continue “for approximately two years,” meaning as late as until January 31, 2028.


Metrolinx and GO plan to accommodate more passengers and increase service along the Lakeshore East line, as part of the GO Expansion Program (formerly “regional express rail”).


Durham Region Transit
PULSE 901A

(Updated — Friday, July 10, 7:55 a.m.) From Monday, January 12 until Sunday, July 12, southbound buses operate along their regular path to Centre Street South and Gibb Street, then detour:

westward along Gibb;
southward along Park Road South; and then
eastward along Bloor Street West to Simcoe Street South,
resuming their regular path southward along Simcoe South.

Southbound buses skip their regular stops

  • on Simcoe Street South beyond Royal Street, at Mill Street, across from First Avenue and at Bloor Street West.

Instead, southbound buses drop off or pick up passengers at temporary stops

  • on Gibb Street at Nassau Street,
  • on Park Road South at Marland and Hillside Avenue and
  • on Bloor Street West at Park Road South [east], beside #249 Bloor West and across from Oxford Street.

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Northbound buses operate along their regular path to Simcoe Street South and Bloor Street West, then detour:

westward along Bloor West;
northward along Park Road South;
eastward along Gibb Street;
southward along Centre Street South; and then
eastward along Fairbanks Street to Simcoe South,
resuming their regular path northward along Simcoe.

Northbound buses skip their regular stops

  • on Simcoe Street South beyond Bloor Street East, at Albany Street and First Avenue and across from Royal Street.

Instead, northbound buses drop off or pick up passengers at temporary stops

  • on Bloor Street West at Oxford Street, across from Park Road South [east] and at Park Road South [west],
  • on Park Road South beyond Montrave Avenue and at Quebec Street and
  • on Gibb Street at Nassau Street and Centre Street South.

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Route N2

(Updated — Friday, July 10, 7:55 a.m.) From Monday, January 12 until Sunday, July 12, southbound buses operate along their regular path to Centre Street South and Olive Avenue, then detour:

eastward along Olive;
southward along Ritson Road South; and then
westward along Bloor Street East to Simcoe Street South,
ending their trips.

Southbound buses skip their regular stops

  • on Simcoe Street South beyond Royal Street, at Mill Street, across from First Avenue and at Bloor Street West.

Instead, southbound buses drop off or pick up passengers at temporary stops

  • on Olive Avenue across from Court Street and beyond Drew Street,
  • on Ritson Road South at McNaughton Street and Bloor Street East and
  • on Bloor Street East at Merritt Street and Simcoe Street South.

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Northbound buses start their trips on Bloor Street East east of Simcoe Street South, then proceed:

along their regular path southward along Simcoe South.

Northbound buses skip their regular stop

  • on the west side of Simcoe Street South north of Bloor Street West.

Instead, northbound buses pick up passengers at a temporary stop

  • on the north side of Bloor Street East east of Simcoe Street South.

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GO Transit
56 Oshawa / Oakville
52 Oshawa / Vaughan
92 Oshawa / Yorkdale

Starting Saturday, January 3, westbound buses operate along their former path to Bloor Street West and Stevenson Road South, then proceed:

northward along Stevenson South; and then
eastward along Gibb Street to Simcoe Street South,
resuming their former path northward along Simcoe South.

Westbound buses pick up passengers at a new stop:

  • on Gibb Street east of Stevenson Road South.

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Eastbound buses operate along their regular path to Centre Street South and Gibb Street, then detour:

westward along Gibb; and then
southward along Stevenson Road South to Bloor Street West,
resuming their regular path eastward along Bloor West.

Eastbound buses pick up passengers at a new stop:

  • on Gibb Street at Stevenson Road South.

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