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416TRAFFIC
ConstructionMon, May 11, 2026 – Fri, May 15, 2026HWY 404 (Northbound)

Nightly Maintenance on HWY 404 Northbound between STOUFFVILLE ROAD, Stouffville-Richmondhill and…

Construction · Mon, May 11, 2026 – Fri, May 15, 2026
★ IMPACT 4/5 · ★ SOURCE-BACKED CLOSURE RECORD

★ Quick facts

Location
At STOUFFVILLE ROAD
Start date
Mon, May 11, 2026 · 9:00 PM
End date
Fri, May 15, 2026 · 5:00 AM
Lanes affected
1 Alternating Lane(s)
Severity
Heavy
Source
Ontario 511Event ID 241330

What's affected

HWY 404 (Northbound) at STOUFFVILLE ROAD is impacted by construction work. Expect impact to 1 Alternating Lane(s).

Suggested detour: Woodbine Avenue and Leslie Street are the practical alternates, but both can be slow through Markham and Richmond Hill.

Same-day events

Plan ahead

Read next

★ RoadHighway 404 statusSegment-level closures, long-running restrictions, and upcoming work.read →★ DayTraffic on Mon, May 11, 2026Same-day events and other road restrictions around this closure.read →★ ClosuresAll road closuresBrowse active and upcoming construction records.read →