Highway 400

highway

Toronto's main route to cottage country, running north from the 401 toward Barrie.

Active now

Check before leaving

Ongoing context

No chronic item today

Severe upcoming

2 full closures in upcoming feed

Next item

Today

Between MAJOR MACKENZIE DRIVE and TESTON ROAD

Typical worst times

Friday afternoons northbound and Sunday evenings southbound, especially May–October.

Detour summary

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

Active today

Items whose reported date range includes today.

Between MAJOR MACKENZIE DRIVE and TESTON ROADConstruction
Apr 25, 2026 · Today
Extreme
Nightly Construction on HWY 400 Northbound between MAJOR MACKENZIE DRIVE and TESTON ROAD, Vaughan. 2 Left(with HOV) Lane(s).
Lanes affected: 2 Left(with HOV) Lane(s)
Between MUSKOKA RD 34 - WHITE FALLS RD (RIGHT) and GEORGIAN BAY RD - CROOKED BAY RD IC 168 OPConstruction
Apr 25, 2026 · Today
Severe
Daily Construction on HWY 400 Northbound between MUSKOKA RD 34 - WHITE FALLS RD (RIGHT) and GEORGIAN BAY RD - CROOKED BAY RD IC 168 OP, Port Severn. 1 Alternating Lane(s).
Lanes affected: 1 Alternating Lane(s)
At CANAL RDConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Northbound between CANAL RD., Bradford and MAPLEVIEW DRIVE, Barrie. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)
At MAPLEVIEW DRIVEConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Northbound between MAPLEVIEW DRIVE, Barrie and HWY 11 JCT, Springwater. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)
At HWY 11 JCTConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Southbound between HWY 11 JCT, Springwater and MAPLEVIEW DRIVE, Barrie. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)
At MAPLEVIEW DRIVEConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Southbound between MAPLEVIEW DRIVE, Barrie and CANAL RD., Bradford. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)
At SEVERN RIVER BRIDGEConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Southbound between SEVERN RIVER BRIDGE, Tay and HWY 11 JCT, Springwater. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)
At HWY 11 JCTConstruction
Apr 25, 2026 · Today
Severe
Nightly Moving Maintenance Closure on HWY 400 Northbound between HWY 11 JCT, Springwater and SEVERN RIVER BRIDGE, Tay. 1 Right Lane(s).
Lanes affected: 1 Right Lane(s)

Upcoming closures and construction

Future reported items after today.

No upcoming closures or construction reported on Highway 400.