Major Collision Causes Traffic Chaos on I-405

Traffic Collision on Interstate 405 South in Fountain Valley Causes Major Delays Today

📍 Fountain Valley, CA

📅 Published: July 20, 2025 at 10:42 AM

🔄 Updated: July 20, 2025 at 12:01 PM

Map showing the location of the accident in Fountain Valley, CA
Fountain Valley, July 20, 2025 -

A significant traffic collision occurred today on Interstate 405 South near Euclid Street in Fountain Valley, CA, causing major disruptions during the morning commute. The incident involved two vehicles: a white sedan and a grey Kia SUV. As a result of the collision, at least half of the main lanes were closed, leading to substantial traffic delays and congestion in the area.

Emergency response teams were dispatched to manage the scene and control traffic flow. Multiple units were assigned to assist with traffic management, diverting vehicles into alternative express lanes to alleviate the backup. The closure of the Euclid on-ramp to southbound Interstate 405 further complicated traffic patterns.

Witnesses reported that the white sedan was facing west in the number one lane, while the grey Kia SUV was blocking the middle lanes. A tow truck was called to the scene to assist with the removal of the vehicles involved. Traffic was at a standstill for a significant period, with motorists advised to seek alternate routes to avoid delays.

Authorities issued a signal alert for the area, indicating that the traffic incident is expected to cause prolonged disruptions. Drivers are urged to exercise caution and remain patient as crews work to clear the scene and restore normal traffic conditions.

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