A four-way stop intersection in Sonoma County, east of Petaluma, will be transitioned to a roundabout beginning Tuesday, Nov. 12, to reduce traffic congestion.
A temporary traffic circle at the intersection of state Highway 116 and state Highway 121 has been under construction by Caltrans for six months.
Single-lane closures will be in effect until 5 a.m. Tuesday. At least one lane will remain open in each direction at all times, Caltrans said in a news release.
The $26 million project, which is scheduled to be completed by the end of 2025, will eventually include an additional travel lane, sidewalks, bike and pedestrian striping, and a park-and-ride.
Unlike conventional intersections enforced by traffic signals, roundabouts force motorists to slow down, reducing the rate and severity of collisions, Caltrans said.
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