Metrolinx Construction Notice October 20, 2026

Topic: Overnight Piling Work at Yonge Street south of John Street

Schedule: October 26, 2026 until Summer 2028

Timing: Due to the nature of the work, activities will take place 24 hours a day, seven days a week

What is happening?

Crews working on behalf of Metrolinx will begin piling work to create a vertical shaft to support the future construction of emergency exit building 4 for the Yonge North Subway Extension. As this work takes place, you may notice periods of noise, vibration, and construction vehicle activity. Traffic will be staged to keep vehicles and pedestrians moving safely while the work is being completed.

Work Details:

  • Crews will use a drill rig to create reinforced concrete columns more than 45 metres into the ground.
  • The concrete piles will be installed close together to form foundation walls.
  • A crane will be used to lift and move construction materials.
  • Trucks will use a one-way route designed to safely merge with traffic.

What to Expect:

  • Noise from the drill rig, excavators, trucks and other construction equipment.
  • A four-metre noise wall will be erected to absorb sound.
  • The site will be lit at night. Lights will be directed away from residences and below the noise wall.
  • Nearby residents may notice vibrations.
  • Water sprays and biodegradable dust suppressants will be used to reduce dust created by construction activities.
  • Noise, vibration and air quality levels will be monitored throughout this work. Measures will be taken to reduce disruptions wherever possible.

Pedestrian Access:

  • Pedestrian access will be closed on the east side of Yonge Street and will remain open on the west side.

Traffic Changes During Stage One:

  • Yonge Street traffic will remain reduced to two northbound and two southbound lanes.
  • Northbound left turns from Yonge Street onto Thornridge Drive and into the Thornhill Plaza at 7670 Yonge Street will be prohibited.
  • Plaza access will be maintained from Old Jane Street.
  • Yonge Street access to Thornridge Drive will be right-in, right out only.
  • Southbound left turn onto John Street from Yonge Street, westbound left turn onto Yonge Street from John Street and eastbound left turn onto Yonge Street from the Thornhill Plaza will be maintained.

Transit Service:

  • York Region Transit shelter and bus stop #2343 and GO Transit bus stop #102043 will be relocated to the northeast corner of Yonge Street and John Street in front of Scotiabank.

Please see construction notice here:

YNSE Construction Notice – Overnight Piling Work at Yonge Street south of John Street

Read more about the YNSE here: http://www.metrolinx.com/YongeSubwayExt