Traffic circles have been in the United States for more than a century, while modern roundabouts began appearing in the country in the early 1990s. However, many drivers today still don’t know the basic rules when it comes to entering and exiting them.
Is a driver supposed to signal before entering? Should drivers keep the left blinker on until they exit? Should they only signal when exiting? While roundabout rules can vary by state, basic driving principles are consistent. Understanding them can make an unfamiliar roundabout much easier to handle.
Learn how to use proper roundabout signaling, including when drivers should use their turn signal and more.
When Should Drivers Signal in a Roundabout?
In most instances, drivers should use the right turn signal before exiting. Many states instruct drivers to signal right after passing the exit immediately before the one they plan to take.
Drivers shouldn’t assume they need to keep the left turn signal on simply because they’re continuing around the roundabout. Signaling requirements vary by state, and a left signal may also be required when changing lanes in a multilane roundabout where permitted.
Drivers should follow their state’s driver handbook or online Department of Transportation guidance for specific signaling requirements.

Who Has the Right of Way in a Roundabout?
Another roundabout rule that can be confusing is which vehicle has the right-of-way. Vehicles already in the roundabout have priority, and approaching drivers should slow down and yield until there’s a safe opening. Coming to a complete stop is unnecessary if the roundabout is clear. Drivers should also watch carefully for pedestrians at designated crossings, particularly when entering and exiting.
Switching Lanes in a Roundabout, Explained
When using a multilane roundabout, drivers should choose the appropriate lane before entering and follow posted directions and pavement markings. The right lane commonly serves right turns and through traffic, while the left lane may serve through traffic and left-turn movements. Drivers should always follow the signs and pavement markings at the specific roundabout.
Drivers should stay in their designated lane or path and shouldn’t cut across traffic to reach an exit. They also shouldn’t stop inside the roundabout to let another vehicle enter, drive across the center island, or reverse if they miss their intended exit. Drivers should give large trucks extra room because they may need both lanes or use the roundabout’s truck apron.
Roundabouts don’t need to be scary for drivers. By understanding the rules, they can be just another routine part of the road.
Sources
Federal Highway Administration, “Roundabouts”
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