ConstructionWed, Oct 21, 2026 – Wed, Nov 4, 2026HWY 400 (Southbound)

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

Construction · Wed, Oct 21, 2026 – Wed, Nov 4, 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 STEELES AVENUE
Start date: Wed, Oct 21, 2026 · 10:00 PM
End date: Wed, Nov 4, 2026 · 5:00 AM
Lanes affected: 1 Alternating Lane(s)
Severity: Heavy
Source: Ontario 511Event ID 321740

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: Severe
Busy window: Likely busiest 7 AM to 8 PM as event traffic overlaps with afternoon rush hour.
Main signal: Toronto Argonauts at BMO Field + Dave Chappelle Karmageddon + TTC Line 2

Toronto Argonauts vs. Montreal Alouettes
Queen St E
Queen St W

What's affected

HWY 400 (Southbound) at STEELES AVENUE 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.

Same-day events

Toronto Raptors vs Chicago Bulls
Oct 21 · Scotiabank Arena
Toronto Marlies vs Hamilton Hammers
Oct 21 · Coca-Cola Coliseum
TTC Line 1 (Yonge-University) - UPDATE - York Mills to Eglinton stations - Nightly early closures starting at 11 p.m. - Monday, October 19 to Thursday, October 22, 2026
Oct 21 · Toronto transit
TTC Line 2 - Kipling to Jane stations - Nightly early closures starting at 11:59 p.m. - Monday, October 19 to Friday, October 23, 2026
Oct 21 · Toronto transit
TTC 29 dufferin - Temporary route change due to road closures for the TFC Matches
Oct 21 · Toronto transit
Toronto Maple Leafs vs New York Rangers
Oct 22 · Scotiabank Arena
TTC Line 1 (Yonge-University) - UPDATE - York Mills to Eglinton stations - Nightly early closures starting at 11 p.m. - Monday, October 19 to Thursday, October 22, 2026
Oct 22 · Toronto transit
TTC Line 2 - Kipling to Jane stations - Nightly early closures starting at 11:59 p.m. - Monday, October 19 to Friday, October 23, 2026
Oct 22 · Toronto transit
Toronto Argonauts vs. Montreal Alouettes
Oct 23 · BMO Field
Dave Chappelle Karmageddon
Oct 23 · Scotiabank Arena