Hwy 400 Closed After Fatal Multi-Vehicle Collision

Key Takeaways

  • A fatal two-vehicle collision occurred on Highway 400 at Major Mackenzie Drive in Vaughan, involving a transport truck and a passenger vehicle.
  • All northbound lanes of Highway 400 are closed for investigation and are expected to remain closed for a lengthy period.
  • The incident resulted in a fatality, but no further details about the victim have been released.
  • The cause of the collision is still unknown and police are asking for anyone with information to come forward.
  • Drivers are advised to avoid the area and seek alternative routes.

Introduction to the Incident
A tragic accident occurred on Highway 400 at Major Mackenzie Drive in Vaughan, resulting in the closure of all northbound lanes. The incident involved a transport truck and a passenger vehicle, and unfortunately, it was fatal. The Ontario Provincial Police (OPP) reported the incident on social media shortly before 5 a.m., stating that emergency crews responded to the scene. The OPP officials are currently investigating the cause of the collision, and the highway remains fully shut down.

Details of the Collision
The collision occurred on Sunday, December 7, 2025, although the exact time of the incident is unclear. The OPP officials have not released any further details about the victim, and the cause of the collision is still unknown. The investigation is ongoing, and police are asking anyone with information to contact the Aurora OPP. The closure of the highway is expected to be lengthy, and drivers are advised to avoid the area. The OPP has urged drivers to seek alternative routes to avoid congestion and delays.

Investigation and Road Closure
The OPP is currently investigating the incident, and all northbound lanes of Highway 400 at Major Mackenzie Drive remain closed. The police have not provided any further details about the collision, and the investigation is ongoing. The road closure is expected to cause significant delays and congestion in the area, and drivers are advised to plan their routes accordingly. The OPP has asked drivers to avoid the area and seek alternative routes to minimize disruptions. The investigation is a priority, and the police are working to determine the cause of the collision and ensure that the highway is safe for drivers.

Response and Updates
The OPP has been providing updates on the incident through social media, keeping the public informed about the status of the investigation and the road closure. The OPP GTA Traffic Twitter account has been posting updates, advising drivers to avoid the area and seek alternative routes. The police have also asked anyone with information about the collision to come forward and contact the Aurora OPP. The OPP is committed to providing regular updates and keeping the public informed about the investigation and any developments.

Conclusion and Next Steps
The fatal collision on Highway 400 at Major Mackenzie Drive is a tragic incident that highlights the importance of road safety. The OPP is working to determine the cause of the collision and ensure that the highway is safe for drivers. The investigation is ongoing, and the police are asking for anyone with information to come forward. Drivers are advised to avoid the area and seek alternative routes to minimize disruptions. The OPP will provide regular updates on the investigation and any developments, and the public is urged to stay informed and plan their routes accordingly. The incident serves as a reminder of the importance of safe driving practices and the need for vigilance on the roads.

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