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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,
  • centre lanes, south of Morgan Avenue and
  • northbound curb lanes, north of Highland Park Boulevard.

The crews use a drill rig to bore holes and extract samples. The work zone blocks the southbound curb lane through the area from 7 a.m. until 7 p.m. It restricts traffic on the connector road to a single shared north- and southbound lane on the west side of the roadway. 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.

Geotechnical surveying at all three sites — and the resulting GO and YRT delays — continue “for approximately two weeks” or until about March 26.


South of Royal Orchard, 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.

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


South of Morgan, 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.

North of Highland Park, 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