The Temecula Valley Wine Country Community Plan adopted by the Riverside County Board of Supervisors planned for the implementation of roundabouts at five intersections along Rancho California Road. The proposed four-mile roundabout corridor is located between Butterfield Stage Road and Glenoaks Road, with roundabouts planned at the intersections of La Serena Way, Calle Contento, Anza Road, Monte De Oro Road, and Glenoaks Road. The roundabouts are intended to retain the unique rural character of the wine country region, while accommodating future traffic volumes, providing traffic calming and increasing public safety.
The roundabout at Anza Road was the first to be constructed and was opened for public use in 2012.
The Transportation Department is in the process of performing preliminary engineering for the four remaining roundabouts in order to develop geometric layouts and to identify right-of-way needs. The study is anticipated to be completed in mid-2019. The timing for the construction of the roundabouts will depend on development in the area and available funding.
The Federal Highway Administration (FHWA) reports that roundabouts have the benefit of lower overall delay in travel time for motorists than signalized and all-way stop-controlled intersections. Using a system of roundabouts, rather than traffic signals, will maximize mobility while keeping Rancho California Road’s two lanes to maintain its rural character. Not having to wait at traffic signals or stop signs translates into the added benefit of reduced vehicle emissions. The FHWA further reports that roundabouts enhance safety compared with signalized intersections. The most comprehensive and recent study showed overall reductions of 35 percent in total collisions, 76 percent in injury collisions, and more than 90 percent in fatality collisions.
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