Major Traffic Disruption on I-280 South Today

Traffic Collision on Interstate 280 in Los Altos Causes Significant Delays Today

📍 Los Altos, CA

📅 Published: August 28, 2025 at 01:36 PM

🔄 Updated: August 28, 2025 at 07:00 PM

Map showing the location of the accident in Los Altos, CA
Los Altos, August 28, 2025 -

A traffic collision on Interstate 280 South in Los Altos, CA, caused significant disruptions to traffic flow today. The incident, involving one vehicle, occurred around 12:49 PM near the Magdalena Avenue on-ramp. Following the collision, both northbound and southbound lanes were partially or fully blocked, leading to considerable delays and diversions for drivers.

Emergency response teams quickly arrived at the scene to manage traffic and implement lane closures. Hazardous materials were reported on the roadway, prompting the involvement of specialized cleanup crews. Traffic was diverted off the highway at Magdalena Avenue, with officials advising motorists to seek alternative routes to avoid congestion.

By 1:09 PM, a signal alert was issued, indicating that all lanes were blocked and estimating a two to three-hour closure for cleanup operations. As the situation developed, one lane was reopened by 1:49 PM, allowing some vehicles to pass, but significant backups persisted as cleanup efforts continued.

As of 6:39 PM, lanes four and five were reported open, but lanes one through three remained blocked, with an uncertain time for full clearance. Motorists are advised to remain cautious and expect delays in the area as cleanup operations are finalized.

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