A significant multi-vehicle collision has forced the complete closure of all northbound lanes on Highway 400 at the Highway 401 interchange Friday morning, creating major traffic disruptions during the busy commute.
Traffic Chaos During Morning Rush
The incident occurred during the peak morning travel period on November 28, 2025, with Ontario Provincial Police first responding to the scene around 8:20 AM EST. According to the latest update at 8:56 AM EST, all northbound lanes remain completely blocked at the critical highway interchange.
Video footage from the scene shows emergency vehicles, including multiple police cruisers and tow trucks, working to clear the wreckage and assist those involved in the collision. The exact number of vehicles involved and the severity of injuries have not been officially confirmed by authorities.
OPP Issues Traffic Advisory
Ontario Provincial Police have confirmed the extensive lane closures through official channels and are urging drivers to avoid the area entirely. All northbound traffic on Highway 400 is being diverted at the Highway 401 interchange, creating ripple effects throughout the Greater Toronto Area's highway network.
Motorists traveling toward Barrie, Vaughan, or other northern destinations are experiencing significant delays and should consider alternative routes such as Highway 427, Highway 410, or local arterial roads until the scene is cleared.
Regional Traffic Impact
The closure at one of Ontario's busiest highway interchanges is causing extensive backups on both Highway 400 southbound approaches and connecting routes throughout the western GTA. Commuters should expect the traffic disruptions to continue through the late morning hours as collision reconstruction teams investigate the scene.
This incident adds to a challenging morning for Toronto-area drivers, with the Highway 400/401 corridor typically handling hundreds of thousands of vehicles daily. Transportation officials recommend checking real-time traffic updates through official OPP social media channels or navigation apps before beginning travel.
The timing of the crash during the Friday morning commute has created particularly difficult conditions, with many weekend travelers also beginning their journeys. Emergency crews are working to clear the scene as quickly as possible while ensuring proper investigation procedures are followed.
