The "turbo roundabout" is located at the intersection of state routes 156 and 25.
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CA's first 'turbo roundabout' opens south of Bay Area. Here's how it works
The Mercury News looked at California Highway Patrol traffic data and found crashes nearly quadrupled since the roundabout opened in February of last year. All of them were relatively minor.
In the previous year, there was one death and two severe injuries at the intersection.