The TTC is forewarning its approximately 1.7 million daily riders to brace for major subway closures coming up this fall as the transit commission works on a re-signalling project along the Yonge-University-Spadina line.

"This is going to cause big problems for Toronto commuters," reported CBC's Charlsie Agro on Friday.

The closures in October will be due to testing of the new system and will cause a nine-day period in which service will not be running at several stations. The affected lines and stops include, specifically:

  • Bloor to St. George stations: Saturday, Oct. 12 to Monday, Oct. 14 (Thanksgiving Day).
  • King to Osgoode stations: Tuesday, Oct. 15 to Friday, Oct. 18.
  • Bloor to St. George stations: Saturday, Oct. 19 to Sunday, Oct. 20.

The TTC said it is co-ordinating with the City of Toronto to devise a traffic plan to mitigate the impacts of the closure. Shuttle buses will be operating between King and Osgoode stations from Oct. 15-18, with routing changes expected to be released in September.

TTC spokesperson Brad Ross hinted that more delays for signal upgrades are likely in the coming months, suggesting that the open section of track between St. Clair and Eglinton stations could be next.

It's expected the signal system replacement will be completed by 2018, along with the new Spadina subway line extension.

With files from CBC's Charlsie Agro