Traffic circles have been present in the United States for more than a century, while modern roundabouts began appearing in the early 1990s. Yet many drivers remain uncertain about the basic rules for entering, navigating, and exiting them. Questions often include: should you signal before entering? Do you leave your left blinker on until you exit? Or should you only signal when leaving the roundabout?
Although specific regulations can vary by state, the fundamental principles for safe and predictable roundabout use are consistent nationwide. Learning these principles will make unfamiliar roundabouts easier to handle and will improve safety for all road users.
When Should Drivers Signal in a Roundabout?
In most situations, drivers should signal right when preparing to exit a roundabout. A common recommendation is to use the right turn signal after passing the exit just before the one you plan to take. This alerts other drivers and pedestrians to your intention to leave the circle.
Drivers should not assume they must keep a left-turn signal on simply because they are continuing around the roundabout. Left turns in a roundabout are typically made by circulating to the desired exit, not by maintaining a left signal. In multilane roundabouts, however, a left signal might be required or appropriate when changing lanes where permitted. Always follow the signs and pavement markings at the specific roundabout you are using.
For exact signaling rules in your area, consult your state’s driver handbook or Department of Transportation guidance. These sources will note any local differences and offer clear instruction for lane usage and signaling expectations.
Who Has the Right of Way in a Roundabout?
Right-of-way at roundabouts is one of the most important—and sometimes confusing—aspects of using them safely. Generally, vehicles already inside the roundabout have the right-of-way. Approaching drivers should slow down, yield to circulating traffic, and enter only when there is a safe gap. If the roundabout is clear, a full stop is usually unnecessary; slow down and merge when it is safe to do so.
Drivers must also be mindful of pedestrians and cyclists. Watch carefully for people using designated crosswalks at roundabout entries and exits and yield where required. Slowing early and scanning for pedestrians helps prevent conflicts and improves safety for everyone.
Switching Lanes in a Roundabout, Explained
Multilane roundabouts require extra attention. Choose the appropriate lane before you enter and obey the posted signs and pavement markings. Typically, the right lane is used for right turns and for some through movements, while the left lane often serves through movements and left turns. Because layouts vary, always follow the posted guidance specific to that roundabout.
Once inside, remain in your chosen lane. Do not cut across traffic to reach an exit and avoid stopping inside the circle to allow others to enter. If you miss your exit, continue around until you can safely exit on the next lap instead of reversing or making abrupt maneuvers.
Large trucks and other wide vehicles may require more room and sometimes use the truck apron or multiple lanes to make their turn. Give them extra space and do not attempt to pass a truck within the roundabout.
By keeping a predictable path, signaling appropriately, and yielding to vehicles already circulating, roundabouts become straightforward and efficient. Proper use reduces conflict points and keeps traffic flowing smoothly.
Sources
Federal Highway Administration, “Roundabouts”
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