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Yonge North subway extension:
Geotechnical surveying continues, March 13



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Two transit agencies and two municipalities are starting the preliminary planning, design and engineering phase of a project to extend the Yonge branch of the TTC’s Line 1 Yonge - University subway into York Region.

Yonge subway extension map.jpgMetrolinx, the TTC, the City of Toronto and the Region of York are planning to extend the line 7.4 kilometres (4.6 miles) through the Thornhill area of Markham and Vaughan to Richmond Hill. The four partners expect this phase of the project to continue for about a year.


With the preliminary planning, design and engineering phase underway, crews continue geotechnical testing

  • on Yonge Street between Highway 7 and Finch Avenue.

The crews work at various locations on Yonge over the next several months.

Geotechnical surveyors investigate underground soil conditions to help engineers design the project.


Starting 7 a.m. Wednesday, March 13 and continuing Mondays to Fridays, crews work

  • on Yonge Street, northbound curb lanes, south of Royal Orchard Boulevard.

The crews use a drill rig to bore holes and extract samples.

The work zone blocks the northbound curb lane through the area from 7 a.m. until 7 p.m. It restricts northbound traffic to just two lanes. At the end of each of work day, crews remove the work zone and restore the roadway.

Expect construction-related noise and dust from equipment and trucks.

Passengers aboard GO Transit buses along this route can expect delays:

  • 32 Brampton / Trinity Common / North York.

Passengers aboard York Region Transit buses along these routes can expect delays:

  • Viva blue;
  • Viva blue “A”;
  • Viva pink;
  • 3 Thornhill;
  • 98E Yonge express; and
  • 99 Yonge.

Geotechnical surveying on Yonge south of Royal Orchard — and the resulting GO and YRT delays — continue “for approximately two weeks” or until about March 26.

2019 - 03-13 - Geotechnical surveying at Royal Orchard and Morgan.png


Starting 7 a.m. Wednesday, March 13 and continuing Mondays to Fridays, crews work

  • on Yonge Street, centre lanes, south of Morgan Avenue.

The crews use a drill rig to bore holes and extract samples.

The work zone blocks the left-turn lane through the area from 7 a.m. until 7 p.m. At the end of each of work day, crews remove the work zone and restore the roadway.

Passengers aboard GO buses along this route can expect delays:

  • 32 Brampton / Trinity Common / North York.

Passengers aboard YRT buses along these routes can expect delays:

  • Viva blue;
  • Viva blue “A”;
  • Viva pink;
  • 5 Clark;
  • 77 / 77A Highway 7;
  • 98E Yonge express; and
  • 99 Yonge.

Geotechnical surveying on Yonge south of Morgan — and the resulting GO and YRT delays — continue “for approximately two weeks” or until about March 26.


Starting 7 a.m. Wednesday, March 13 and continuing Mondays to Fridays, crews work

  • on Yonge Street, northbound curb lanes, north of Highland Park Boulevard.

The work zone blocks the northbound curb lane through the area from 7 a.m. until 7 p.m. It restricts northbound traffic to just two lanes. At the end of each of work day, crews remove the work zone and restore the roadway.

Passengers aboard GO buses along this route can expect delays:

  • 32 Brampton / Trinity Common / North York.

Passengers aboard YRT buses along these routes can expect delays:

  • Viva blue;
  • Viva blue “A”;
  • Viva pink;
  • 2 Milliken;
  • 5 Clark;
  • 77 / 77A Highway 7;
  • 98E Yonge express; and
  • 99 Yonge.

2019 - 03-13 - Geotechnical surveying at Highland Park.png