● WED, MAY 13 · TODAY · HEAVY ●★JAYS VS RAYS 7:07 PM ROGERS CENTRE★QUEEN ST W CLOSURE · QUEEN ST W 43M WEST OF YONGE ST★
416TRAFFIC
ConstructionTue, May 19, 2026 – Fri, May 22, 2026HWY 400 (Southbound)

Nightly Construction on HWY 400 Southbound Express between MAJOR MACKENZIE DRIVE and BASS PRO MIL…

Construction · Tue, May 19, 2026 – Fri, May 22, 2026
★ IMPACT 4/5 · ★ SOURCE-BACKED CLOSURE RECORD

★ Quick facts

Location
Between MAJOR MACKENZIE DRIVE and BASS PRO MILLS DRIVE
Start date
Tue, May 19, 2026 · 9:00 PM
End date
Fri, May 22, 2026 · 5:00 AM
Lanes affected
2 Alternating Lane(s)
Severity
Heavy
Source
Ontario 511Event ID 243378

What's affected

HWY 400 (Southbound) between MAJOR MACKENZIE DRIVE and BASS PRO MILLS DRIVE is impacted by construction work. Expect impact to 2 Alternating Lane(s).

Suggested detour: Highway 27 and Yonge Street are the practical alternates south of King City; both are heavily congested in peak.

Same-day events

Plan ahead

Read next

★ RoadHighway 400 statusSegment-level closures, long-running restrictions, and upcoming work.read →★ DayTraffic on Tue, May 19, 2026Same-day events and other road restrictions around this closure.read →★ ClosuresAll road closuresBrowse active and upcoming construction records.read →