Bloor-Yonge Capacity Improvements Project Construction Notices

Effective 2026 until further notice

For background information, please visit the project page.

Geotechnical investigations to assess ground conditions for the Bloor-Yonge Capacity Improvements (BYCI) project

Timeline: July 23 to August 31, 2026

*Content / timeline accurate at time of publishing

Starting as early as July 23 until August 31, 2026, the TTC will conduct hydrovac excavation, borehole drilling and geotechnical investigations to assess ground conditions for the Bloor-Yonge Capacity Improvements (BYCI) project. Work will take place within the TTC property at 81 Bloor Street East, followed by drilling on the public right-of-way on Asquith Avenue, adjacent to the Toronto Reference Library, on Yonge Street, between Bloor Street and Cumberland Street, and on Bloor Street East, between Yonge Street and Park Road. Drilling will take place overnight from 10:00 p.m. to 5:00 a.m., and during the day, when it can be accommodated, from 9:00 a.m. to 5:00 p.m. The work will require a hydrovac truck and drilling machinery, as well as vehicles moving in and out of the work sites. The work will also require vehicular and bike lane diversions and sidewalk occupancy. Paid Duty Officers (PDOs) will be requested to help guide motorists, cyclists, and pedestrians through the diversions.

These dates and timelines are subject to change depending on weather and site conditions.

What to expect

Hydrovac excavation and borehole drilling within 81 Bloor Street East and on the city right-of-way on Asquith Avenue, Yonge Street, and Bloor Street East, from early as July 23 to August 31, 2026
Work will take place overnight from 10:00 p.m. to 5:00 a.m. or during the day from 9:00 a.m. to 5:00 p.m., depending on the site.
Bike lane and vehicular diversions and sidewalk occupancy – Paid Duty Officers (PDOs) will be requested to help guide traffic
Noise, dust and vibrations will be evident when work is in full operation

Thank you for your patience during this work.

Preparatory Work to Expand Bloor-Yonge Station

Bloor-Yonge Station is the busiest subway station on the TTC. The original station opened in 1954 and now requires expansion and modernization to accommodate future TTC ridership and neighbourhood density.

The project includes significant upgrades to enhance customer safety, accessibility and service quality.

Improvements include:

A new eastbound Line 2 (Bloor-Danforth) passenger platform
An enhanced westbound Line 2 passenger platform created by reconfiguring the existing shared centre platform
Expansion of both northbound and southbound Line 1 (Yonge-University) passenger platforms
Enhanced concourse level
New elevators, escalators and stairwells to improve station circulation
A new accessible subway entrance at 81 Bloor Street East

What to Expect

The first phase of preparatory construction did not impact subway service or access to Bloor-Yonge Station.
Preparatory work started in May 2023. In order to build a new, accessible subway entrance at 81 Bloor Street East (former site of The Firkin), the TTC removed the existing structures at 81 Bloor St East, and 40/42 Hayden Street. The TTC also removed the former carwash at 830 Church Street beside the Toronto Reference Library to build a future fan building to enhance air circulation at the station.
There were temporary reductions in the Sherlock Holmes Laneway and short-term walkway closures to install construction hoarding beside the Toronto Reference Library.
The first phase of utility relocations was completed as of October, 2024. Some additional preparatory works may take place in advance of major construction.
Phased reductions on the sidewalks and curb lanes were implemented on Bloor Street East, between Yonge Street and Park Road.
Access to businesses and residences was maintained at all times.
Work hours were typically Monday to Friday from 7 a.m. to 7 p.m. Extended, weekend, or overnight work hours were communicated to the community well in advance.

Preparatory Work Map and Scope of Work

Demolition of 830 Church Street carwash (Completed)
Demolition of 81 Bloor St East /40-42 Hayden Street (Completed)
Utility works – Hydro relocation on Bloor Street (Completed)
Utility works – Sewer relocation on Bloor Street (Completed)
TTC Community Office – 25 Hayden Street (Opened Q2 2023)

Contact us
If you are interested in receiving updates about this project, please sign-up to our email list. If you require any information about the project, please email blooryongeproject@ttc.ca or call 416-472-2524.

Please view the main project page for more information.