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16th Avenue / Markham Road construction: TTC detour, July 15 to 18; construction also affects GO, YRT services



Since fall 2021, York Region contractors have been rehabilitating a 1.5-kilometre section of the York Durham Sewage System that extends under

  • 16th Avenue (Regional Road 73) between west of Williamson Road to west of Mingay Avenue

in the City of Markham.

16th Avenue Markham sewer rehabilitation.jpg

The project includes:

  • installing a temporary sewage bypass pipe;
  • rehabilitating two access shafts;
  • relining the trunk sewer; and
  • other work.

Starting 9 p.m. Friday, July 5, the Region and City are closing

  • Markham Road (Regional Highway 48), north- and southbound lanes, north of 16th Avenue

to accommodate the next phase of the project.

The Region is also restricting traffic lanes on:

  • 16th Avenue, east and west of Markham Road / Main Street North; and
  • Main Street North, south of 16th Avenue.

The TTC is detouring buses along this route, while the street is closed:

  • 102 Markham Rd.

102_SW_Jul15.jpg

Closing this part of Markham Road to traffic likely requires GO Transit to detour buses along these routes:

  • 70 Uxbridge / Stouffville / Markham; and
  • 71 Uxbridge / Stouffville / Toronto.

However, GO has not announced detour-routing information.

Also, York Region Transit passengers aboard buses along this route can expect delays near Markham Road / Main Street North:

  • 16 16th Avenue.

This phase of construction on Markham Road and 16th Avenue and the resulting GO, TTC and YRT service changes continue until July 8 (7 a.m.).


102D Markham Rd

From 7 p.m. Friday, July 15 until 7 a.m. Monday, July 18, southbound buses operate along their regular route to Markham Road and Edward Jeffreys Avenue, then detour:

westward along Edward Jeffreys;
southward along Mingay Avenue; and then
eastward along 16th Avenue to Markham Road / Main Street North,
resuming their regular route southward along Main North.

Southbound buses skip their regular stops

  • on Markham Road beside #9350 Markham and at 16th Avenue.

Northbound buses operate along their regular route to Main Street North and 16th Avenue, then detour:

eastward along 16th;
northward along Williamson Road; and then
westward along Bur Oak Avenue to Markham Road,
resuming their regular route northward along Markham.

Northbound buses skip their regular stops

  • on Markham Road beside #9375 Markham, across from Edward Jeffreys Avenue and at Bur Oak Avenue.



























































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