ConstructionSun, May 10, 2026 – Fri, May 15, 2026HWY 400 (Northbound)
Nightly Construction on HWY 400 Northbound Express between BASS PRO MILLS DRIVE and MAJOR MACKENZ…
Construction · Sun, May 10, 2026 – Fri, May 15, 2026
★ IMPACT 4/5 · ★ SOURCE-BACKED CLOSURE RECORD
★ Quick facts
- Location
- Between BASS PRO MILLS DRIVE and MAJOR MACKENZIE DRIVE
- Start date
- Sun, May 10, 2026 · 10:00 PM
- End date
- Fri, May 15, 2026 · 6:00 AM
- Lanes affected
- 2 Alternating Lane(s)
- Severity
- Heavy
- Source
- Ontario 511Event ID 241232
What's affected
HWY 400 (Northbound) between BASS PRO MILLS DRIVE and MAJOR MACKENZIE 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.
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