Major Traffic Disruption on State Route 78

Traffic Collision on State Route 78 in San Marcos Causes Lane Closures Today

📍 San Marcos, CA

📅 Published: July 27, 2025 at 12:07 PM

Map showing the location of the accident in San Marcos, CA
San Marcos, July 27, 2025 -

A traffic collision on State Route 78 East at Interstate 15 West in San Marcos, CA, has resulted in significant traffic disruptions today. The incident, involving two vehicles, occurred during the late morning hours, impacting the flow of traffic during a busy time for commuters.

The collision led to the closure of lane #1 on both the eastbound and westbound sides of State Route 78, causing potential delays and congestion in the area. Emergency response teams quickly arrived to manage traffic and control the scene, ensuring safety for all motorists.

One vehicle involved is described as a blue vehicle, possibly a Nissan, which ended up on its driver's side, blocking lane #1. The other vehicle involved did not have a specific make or model identified. As emergency responders worked to clear the scene, motorists were advised to seek alternate routes to avoid the affected area.

Drivers traveling through San Marcos should anticipate delays and possible backups as the situation is managed. Authorities are working diligently to restore normal traffic flow as quickly as possible. For those planning to travel along State Route 78 and Interstate 15, staying informed about the traffic incident will be crucial to navigating the area efficiently.

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