First published Oct 29, 2026, 11:31:15 AM UTC · Last updated Oct 29, 2026, 11:31:15 AM UTC

accidentsAndIncidents on HWY 401 (Eastbound)

A collision was reported on eastbound Highway 401 near Markham Road in Toronto, with all lanes closed. The reported severity is unknown.

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The full closure affects travel on this section of highway.

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Generated scores

Scores are based on the cited reporting and use a 1–10 scale. Read the methodology.

Confidence: 8/10How certain the assessment is based on the clarity and evidence in the cited reporting.
Geographic reach: 1/10How widely the event reaches, from a local area (1) to worldwide impact (10).
Global importance: 2/10The event's broader significance, from limited importance (1) to major global importance (10).
Impact magnitude: 3/10The scale or severity of the real-world impact, from minor (1) to extreme (10).
Urgency: 5/10How time-sensitive the event is, from low urgency (1) to immediate attention needed (10).

Ontario 511 Traffic Events accidentsAndIncidents on HWY 401 (Eastbound)Contains information licensed under the Open Government Licence – Ontario (https://www.ontario.ca/page/open-government-licence-ontario). Source: Ontario 511. Information is provided “as is”; actual roadway conditions may differ. No endorsement by Ontario 511, MTO, or the Government of Ontario is implied. Usage terms

Related developments reported in the last 30 days. These are not necessarily ongoing incidents.

Nearby · within 200 km
roadwork on HWY 401 (Eastbound)Nov 3, 2026, 4:30 AM UTC
3 reports describing the same event are grouped here. Expand the group to review every source report.
Nearby · within 200 km
roadwork on HWY 412 (Northbound)Nov 3, 2026, 4:00 AM UTC
The source reports nightly maintenance and a full closure of all lanes on the HWY 412 northbound off-ramp at HWY 407 in Whitby, Ontario. The listed reporting organization is MTO.
Nearby · within 200 km
roadwork on HWY 5 (Eastbound)Nov 2, 2026, 2:00 PM UTC
Daily construction is reported on eastbound HWY 5 between Spencer Creek and Flamboro Downs Road in Hamilton, with all lanes closed.
Nearby · within 200 km
roadwork on HWY 400 (Southbound)Nov 2, 2026, 2:00 AM UTC
Nightly construction is reported on southbound HWY 400 in Vaughan, with three alternating lanes affected and several ramps closed. The source lists severity as unknown.
Nearby · within 200 km
accidentsAndIncidents on HWY 6 (Southbound)Oct 30, 2026, 10:08 PM UTC
2 reports describing the same event are grouped here. Expand the group to review every source report.
Same topic
Hazard on Highway 1 (Lower Mainland District)Nov 3, 2026, 11:48 PM UTC
The source reports a vehicle stall on Highway 1 in the Lower Mainland District and lists a left-lane closure, while also stating that all lanes are open. It gives an update time of November 3, 2026, at 4:48 p.m. PCT, with the next update scheduled for 5:30 p.m.

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