Accident on 401 Traffic Update Today: WB Highway 401 Closed Near Toronto After Loose Tire Hits SUV, Two Hospitalized – Check Affected Routes, Alternative Routes, Lane Closures, Helpline Numbers & More

A loose tire detached from an eastbound vehicle on Highway 401 in Clarington, crossed into the westbound lanes, and struck an SUV, injuring two people.

By: Shubhi Kumar
Last Updated: July 21, 2026 00:16:46 IST

Accident on 401 Traffic Update Today: A section of westbound Highway 401 east of Toronto was closed on Monday after a loose tire detached from an eastbound vehicle, crossed the median, and crashed into a passing SUV in Clarington, Ontario. The frightening incident left two people injured and caused major traffic disruptions.

Accident on 401 Traffic Update Today: What Happened?

A section of westbound Highway 401 east of Toronto was closed on Monday after a loose tire detached from an eastbound vehicle, crossed the median, and crashed into a passing SUV in Clarington, Ontario. The frightening incident left two people injured and caused major traffic disruptions.

According to the Ontario Provincial Police (OPP), the incident occurred at around 11:30 a.m. near Newtonville Road. Investigators said a tire came off an eastbound vehicle, crossed into the westbound lanes, and struck an SUV traveling in the opposite direction. The impact caused extensive damage to the SUV.

Accident on 401 Traffic Update Today: Two People Hospitalized

Police confirmed that the SUV’s two occupants were taken to hospital. One person suffered serious injuries, while the other sustained minor injuries.

Emergency responders, including paramedics and firefighters, arrived quickly at the scene to assist the victims before transporting them to hospital for treatment.

Accident on 401 Traffic Update Today: SUV Suffers Extensive Damage

Footage and images from the crash scene show the severity of the collision.

  • The SUV’s windshield was almost entirely shattered.
  • Sections of the vehicle’s roof were crushed inward.
  • Debris from the collision was scattered across multiple lanes.

The incident serves as a reminder that loose vehicle parts can become deadly projectiles on high-speed highways.

Accident on 401 Traffic Update Today: Highway Closures

Following the crash:

  • Westbound Highway 401 remains closed at Newtonville Road.
  • Eastbound lanes, which were temporarily closed, have reopened to traffic.

Police are expected to keep the westbound lanes closed until the investigation is completed and the roadway is cleared.

Accident on 401 Traffic Update Today: Affected Routes

The closure is affecting motorists traveling westbound on Highway 401 through Clarington and nearby communities east of Toronto. Traffic is slowing well before the Newtonville Road exit as emergency crews continue their work.

Drivers heading toward Oshawa, Bowmanville, Courtice, and the Greater Toronto Area may experience delays during the afternoon and evening commute.

Accident on 401 Traffic Update Today: Routes to Avoid

Motorists are advised to avoid:

  • Westbound Highway 401 near Newtonville Road
  • The immediate crash zone in Clarington
  • Nearby interchanges experiencing traffic backups due to lane closures

The OPP is asking drivers to remain patient and avoid entering congested areas unless necessary.

Accident on 401 Traffic Update Today: Alternative Routes

Drivers traveling westbound should consider alternate routes until Highway 401 fully reopens. Depending on your destination, possible alternatives include:

  • Highway 2 (King Street)
  • Regional roads through Clarington
  • Other local detour routes as directed by police and traffic signs

Motorists should check live traffic updates before beginning their journey, as conditions may change throughout the day.

Accident on 401 Traffic Update Today: Heavy Congestion & Road Closure

Significant congestion has developed on westbound Highway 401 because of the lane closures. Traffic volumes continue to build as vehicles are diverted away from the crash site.

Emergency crews remain on scene investigating the collision, removing debris, and ensuring the roadway is safe before reopening all lanes.

Accident on 401 Traffic Update Today: Police Investigation Underway

Investigators are working to determine how the tire became detached from the eastbound vehicle. Authorities have not released details about the vehicle involved or whether any charges are being considered.

Police are also examining whether mechanical failure or inadequate vehicle maintenance contributed to the incident.

Accident on 401 Traffic Update Today: OPP Safety Advice

The Ontario Provincial Police are reminding motorists to inspect their vehicles regularly, particularly tires, wheel fasteners, and suspension components.

Routine maintenance can help prevent dangerous incidents involving detached vehicle parts and improve safety for everyone on Ontario’s highways.

Accident on 401 Traffic Update Today: Helpline Numbers

For emergencies or to report a collision:

  • Emergency: 911
  • Ontario Provincial Police (Non-Emergency): 1-888-310-1122
  • Road Conditions (Ontario 511): Check Ontario 511 for the latest highway closures, traffic conditions, and travel advisories before heading out.
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