November 28, 2025, 6:25 AM EST – Commuters heading eastbound on Canada’s busiest highway are facing significant disruptions this morning. Police have confirmed a complete closure of the eastbound lanes of Highway 401 just east of Oshawa, following a serious jack-knifed tractor-trailer incident that has brought traffic to a complete standstill.

Urgent Traffic Alert: Eastbound Highway 401 Closed Past Oshawa

The incident occurred in the early morning hours, prompting a swift response from emergency services. All eastbound lanes of Highway 401 near the Highway 418 interchange are currently impassable. This critical section of the 401, a primary artery for transportation across Ontario, is now completely blocked, causing immediate concern and major headaches for thousands of morning commuters.

Details of the Highway 401 Incident

According to preliminary police reports, a tractor-trailer jack-knifed, effectively blocking the entire eastbound carriageway. Emergency crews are on the scene, working diligently to clear the highway and restore traffic flow as quickly and safely as possible. Fortunately, initial reports indicate no injuries have been sustained in the incident, which is a significant relief given the potential severity of such a major vehicle accident.

Motorists are strongly advised to seek alternative routes to avoid the affected area. Significant traffic backups are already forming, and travellers should anticipate extended delays throughout the morning. Drivers who typically use the eastbound Highway 401 through Oshawa should plan ahead, consider using secondary provincial highways, or explore local municipal roads as detours. Postponing non-essential travel is also highly recommended if possible.

Impact on Commuters and Recommended Actions

• Expect Major Delays: The full closure of eastbound 401 traffic will have a significant ripple effect on surrounding roads and communities.
• Plan Alternate Routes: Consult real-time traffic applications and maps for the most up-to-date information on detours and road conditions.
• Stay Informed: Monitor local news outlets and official traffic advisories for the latest updates on the incident and estimated reopening times for the 401.
• Drive Safely: If you are detouring onto unfamiliar roads, exercise extreme caution, reduce your speed, and allow ample travel time to reach your destination.

Authorities have not yet provided an estimated time for the reopening of the eastbound lanes of Highway 401. Your patience and cooperation are greatly appreciated as emergency crews work tirelessly to resolve this situation safely and efficiently. For real-time updates on road conditions across Ontario, always check official sources like 511 Ontario before heading out.