Major Collision Disrupts Traffic on State Route 78

Traffic Collision on State Route 78 East in San Marcos Causes Delays Today

📍 San Marcos, CA

📅 Published: August 11, 2025 at 02:06 PM

🔄 Updated: August 11, 2025 at 03:31 PM

Map showing the location of the accident in San Marcos, CA
San Marcos, August 11, 2025 -

A traffic collision occurred today on State Route 78 East at Twin Oaks Valley in San Marcos, CA, involving four vehicles: a black Dodge truck, a white sedan, a black sedan, and a white Volvo, which was reported as an SUV. The incident resulted in significant traffic disruptions, including lane closures and debris on the roadway, notably a knocked-down light pole.

Emergency response teams quickly arrived at the scene to manage traffic and facilitate the clearing of the roadway. Several tow trucks were dispatched to remove the vehicles involved in the collision, helping to minimize delays for motorists. As a result of the incident, drivers experienced congestion and delays, particularly during the busy afternoon traffic period.

Motorists are advised to seek alternate routes while crews work to restore normal traffic flow. The presence of emergency units and ongoing cleanup efforts may continue to affect traffic patterns in the area.

Drivers are encouraged to remain cautious and attentive, especially in locations where traffic incidents have occurred. Updates will be provided as the situation develops and road conditions improve.

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