Major Traffic Jam on I-405 After Truck Blockage

Traffic Collision on Interstate 405 in Los Angeles Causes Delays Today

📍 Los Angeles, CA

📅 Published: September 26, 2025 at 12:01 PM

🔄 Updated: September 26, 2025 at 01:00 PM

Map showing the location of the accident in Los Angeles, CA
Los Angeles, September 26, 2025 -

A significant traffic incident occurred today on the southbound lanes of Interstate 405 (I-405) near the interchange with U.S. Highway 101 in Los Angeles, CA. A semi truck was reported to be blocking multiple lanes, leading to the issuance of a SIG Alert for the area. As a result, lanes one through six are currently closed, causing substantial traffic delays and congestion during the busy midday hours.

Emergency services responded promptly to the scene, with units actively managing traffic and securing the area. The semi truck is positioned sideways across the roadway, complicating traffic flow further. Fortunately, the High Occupancy Vehicle (HOV) and Sepulveda on-ramps remain open, providing some relief for drivers navigating the situation.

The SIG Alert has been extended, indicating that the lane closures will last for an additional 30 minutes. Motorists are advised to seek alternate routes to avoid the backup and delays associated with this traffic collision.

Travelers should remain cautious and stay updated on traffic conditions as emergency crews work to clear the scene. This incident underscores the importance of being informed during peak travel times, especially when unexpected traffic incidents occur on major highways.

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