A tragic collision has resulted in a major highway closure north of Toronto. All northbound lanes of Highway 400 are closed at Major Mackenzie Drive in Vaughan following a fatal two-vehicle crash.
Details of the Highway 400 Incident
The serious collision occurred on the morning of Sunday, December 7, 2025. Ontario Provincial Police officers were dispatched to the scene to investigate the circumstances of the crash that claimed at least one life. The closure has been implemented to allow for a comprehensive collision reconstruction and investigation, a standard procedure for fatal incidents on Ontario's highways.
Traffic Impacts and Police Investigation
The closure of all northbound lanes at the Major Mackenzie Drive interchange is causing significant traffic disruptions for drivers heading out of the Greater Toronto Area. Motorists are being advised to seek alternate routes and expect lengthy delays. The OPP has not released further details about the vehicles involved or the potential cause of the collision at this early stage. The investigation is ongoing.
Context of Road Safety in the Region
This fatal crash underscores ongoing concerns about safety on one of Ontario's busiest transportation corridors. Highway 400 is a critical artery for commercial and passenger traffic moving north from Toronto. The incident occurred on the same highway where, separately, a teen was recently charged for exceeding 200 km/h, highlighting varied traffic enforcement challenges. The OPP will continue to manage the scene until evidence collection is complete and the lanes can be safely reopened.
