When: Tuesday, September 1, 2026, until construction is complete

Where: Parkway Avenue, from Elm Street to Main Street Markham North

Reason: Markham Village storm sewer upgrade construction

Routes affected: 403 - St. Brother André School Special via Raymerville 

Detour:

Morning

Buses will travel westbound on Parkway Avenue, right on northbound Paramount Road, left on westbound Ramona Boulevard and back to regular routing on northbound Main Street Markham.

Stops Missed: 1855,1856 and 1857

Afternoon

Buses will travel westbound on Parkway Avenue, right on northbound Paramount Road, left on westbound Ramona Boulevard and back to regular routing on southbound Main Street Markham.

Stops missed:  1855 and 1856

Alternative stops:

Morning

  • Stop 1854 on Parkway Avenue at Paramount Road
  • Stop 1858 on Main Street Markham North, south of Springdale Street

Afternoon

  • Stop 1854 on Parkway Avenue at Paramount Road
  • Stop 1862 at Bullock Drive at Snider Drive

Detour Map:

Route 403 Detour Map September 2026

Please plan ahead and allow yourself extra travel time. For trip planning assistance, contact us at 1-866-668-3978.