Traffic Chaos on U.S. Highway 101 in Petaluma

Traffic Collision on U.S. Highway 101 in Petaluma Causes Delays Today

📍 Petaluma, CA

📅 Published: September 18, 2025 at 10:09 AM

Map showing the location of the accident in Petaluma, CA
Petaluma, September 18, 2025 -

A traffic collision on U.S. Highway 101 South in Petaluma, CA, caused significant disruptions during the morning commute today. The incident, which involved three vehicles—a silver Honda CRV, a gray Toyota sedan, and a white Mazda sedan—occurred around 9:16 AM. A utility trailer, which became unhitched during the collision, was blocking one lane, leading to traffic congestion in the area.

Emergency services responded promptly with multiple units to manage the scene and coordinate towing operations. The Honda CRV was confirmed to be drivable, while the trailer remained on the roadway until it could be cleared. As a result of the traffic incident, drivers experienced delays and backups on U.S. Highway 101 South, particularly near the Petaluma Boulevard North off-ramp.

By 9:35 AM, one lane had been cleared, but traffic remained slow as crews worked to remove the remaining obstacles. Motorists were advised to seek alternative routes to avoid further delays. The situation underscores the importance of remaining cautious and prepared for unexpected incidents during peak travel times.

As cleanup efforts continued, drivers were encouraged to stay alert and follow any posted detours or instructions from traffic management personnel. Updates on traffic conditions in Petaluma, CA, will be provided as they become available.

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