The rules for driving a roundabout in California are short: yield to any vehicle already in the circle, choose your lane before you enter, travel counterclockwise without stopping or passing, and signal your right turn before you exit. Those requirements come from the California Vehicle Code and Caltrans guidance, and they apply at every roundabout in the state.
Yield Before You Enter
Every roundabout entry is controlled by a yield sign. Under Vehicle Code section 21803, you must give the right-of-way to any vehicle already in the intersection or close enough to be an immediate hazard.1California Legislative Information. California Code VEH 21803 – Right-of-Way at Yield Signs You also yield to pedestrians and bicyclists at the crossing.2Caltrans. Navigating Roundabouts
Slow down on approach and look left for a gap in circulating traffic. If entering would force another driver to brake or swerve, the gap isn’t there yet. Wait for the next one.
Once you’re in, keep moving. Stopping inside a roundabout (except to avoid a collision) or trying to pass another vehicle is not allowed and creates the exact conflicts the design is meant to prevent.2Caltrans. Navigating Roundabouts
Pick Your Lane Before You Enter
In a multi-lane roundabout, the lane you need depends on where you plan to exit, and you have to be in it before you cross the yield line. Changing lanes inside the circle isn’t permitted. Caltrans gives the standard positioning:2Caltrans. Navigating Roundabouts
- For a right turn at the first exit, approach in the right lane and leave in the right lane.
- To go straight through at the second exit, either lane works, and you exit in the lane you entered.
- For a left turn at the third exit or beyond, approach in the left lane and exit from that lane.
Check the signs and pavement arrows on approach. Some roundabouts assign lanes differently from the general pattern, and the markings control.
Miss your exit? Keep circulating and take it on the next lap. Don’t stop, and don’t back up.
Signal Before You Exit
California law requires a turn signal any time a lane change or turn could affect another vehicle.3California Legislative Information. California Code VEH 22107 – Turning and Lane Change Signals In a roundabout, that means turning on your right signal before your exit, and Caltrans instructs drivers to do exactly that.2Caltrans. Navigating Roundabouts The signal tells drivers waiting at the next entry that you’re actually leaving the circle.
The Vehicle Code says a signal must run continuously for the last 100 feet before a turn.4California Legislative Information. California Code VEH 22108 – Signal Duration Smaller roundabouts often don’t have that much room between exits, so the practical rule is to signal right after you pass the exit before yours. If you’re taking the first exit (a right turn out of the roundabout), signal before you enter and keep it on through the exit.
Pedestrians and Bicyclists
Drivers must yield to pedestrians in any marked or unmarked crosswalk.5California Legislative Information. California Code VEH 21950 – Pedestrians Rights and Duties Roundabout crosswalks sit set back from the entry and exit points so drivers handle the pedestrian yield first and the circle-entry yield second, rather than at the same instant.
Bicyclists have the same rights and duties as vehicle drivers under Vehicle Code section 21200.6California Legislative Information. California Code VEH 21200 – Bicycle Rights and Duties A cyclist can ride through the roundabout like any car, taking the lane, yielding on entry, and signaling on exit. A cyclist who prefers not to mix with traffic can dismount and walk through the crosswalks instead. Both are legal, and drivers should give a cyclist inside the circle the same space they’d give another vehicle.
Emergency Vehicles Inside the Circle
When you see flashing red lights and hear a siren, Vehicle Code section 21806 requires you to yield, pull to the right edge of the road, clear any intersection, and stop until the emergency vehicle passes.7California Legislative Information. California Code VEH 21806 – Yielding to Emergency Vehicles “Clear of any intersection” is the operative phrase for a roundabout: if you’re already inside, continue to your next exit, leave the circle, then pull right and stop. Stopping inside the roundabout blocks everyone, including the emergency vehicle.8Federal Highway Administration. Roundabouts and First Responders: Saving Lives Together
If you haven’t crossed the yield line yet, stay put and let the emergency vehicle pass before you enter.
Tickets, Points, and Insurance
Roundabout violations are standard moving infractions. Entering without yielding is a violation of section 21803, and failing to signal your exit is a violation of section 22107.1California Legislative Information. California Code VEH 21803 – Right-of-Way at Yield Signs3California Legislative Information. California Code VEH 22107 – Turning and Lane Change Signals Each adds one point to your driving record. The base fine is modest, but with court fees, assessments, and surcharges, the total typically runs above $200.
Points also count toward the DMV’s negligent-operator thresholds (four in 12 months, six in 24, or eight in 36), any of which can lead to license probation or suspension. Even a single point tends to show up at insurance renewal, and the premium goes up with it.