ConstructionSat, Oct 24, 2026 – Sat, Nov 21, 2026HWY 400 (Southbound)

Nightly Maintenance on HWY 400 Southbound between 407, Vaughan and FINCH AVENUE, Toronto.

Construction · Sat, Oct 24, 2026 – Sat, Nov 21, 2026

★ IMPACT 4/5 · ★ SOURCE-BACKED CLOSURE RECORD

Highway 400 status Traffic today Closures today This weekend

★ Quick facts

Road: HWY 400 (Southbound)
Location: At 407
Start date: Sat, Oct 24, 2026 · 12:00 AM
End date: Sat, Nov 21, 2026 · 5:00 AM
Lanes affected: 1 Alternating Lane(s)
Severity: Heavy
Source: Ontario 511Event ID 331302

Traffic context

Traffic today

This closure is one part of the day. The daily brief shows the event load, other road work, and the likely busy window from the same calendar data.

Open daily brief

Day status: Heavy
Busy window: All day; arrival pressure builds 6:30 PM to 7:30 PM
Main signal: Royal Agricultural Winter Fair + TTC 160 bathurst north + HEP Canadian Show Jumping Championship/Mad Barn Indoor Eventing

Royal Agricultural Winter Fair
King St E
Queen St E

What's affected

HWY 400 (Southbound) at 407 is impacted by construction work. The source lists affected lanes as: 1 Alternating Lane(s).

Corridors to compare: Highway 27 and Yonge Street run north–south south of King City; both are surface corridors with signals and local access. Which one wins depends on the day — check a live map before you leave.

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