At a modern roundabout, the driver already in the circle has the right of way, and anyone approaching must yield before entering. That is the whole answer to the question of who has the right of way in a traffic circle, and almost every collision at these intersections traces back to a driver who ignored it. Traffic flows counterclockwise around the center island, so the vehicles you need to watch for are coming from your left.1Federal Highway Administration. Roundabouts
Modern Roundabouts vs. Older Traffic Circles
Before you apply the yield-to-circulating rule, make sure you’re actually at a modern roundabout. These are compact, force a tight curve on entry that drops speeds to around 15 to 20 mph in urban areas, and post a yield sign at every approach.2Insurance Institute for Highway Safety. Roundabouts
Older traffic circles and rotaries, common in the Northeast and in parts of New Jersey, don’t always work the same way. They’re larger, faster, and some still operate under a yield-to-the-right rule in which circulating traffic yields to entering vehicles. Many of them manage the flow with traffic signals or stop signs instead of yield signs.2Insurance Institute for Highway Safety. Roundabouts If you see a signal or stop sign on the circle itself, follow those controls. The yield-to-circulating rule applies at modern roundabouts, not necessarily at every circular intersection you’ll encounter.
What Yielding Actually Requires
Every modern roundabout approach has a yield sign, and the Manual on Uniform Traffic Control Devices does not allow yield signs on the circulatory roadway itself.3Federal Highway Administration. 2009 MUTCD Chapter 2B – Regulatory Signs, Barricades, and Gates The Uniform Vehicle Code, the model law most states follow, requires a driver approaching a yield sign to slow to a reasonable speed and, if necessary, stop at the marked line or before the crosswalk, then yield to any vehicle already in the intersection or close enough to create an immediate hazard.4National Committee on Uniform Traffic Laws and Ordinances. Uniform Vehicle Code Millennium Edition
In practice, that means waiting for a gap large enough to merge without forcing anyone already in the circle to brake. Once you’re in, keep moving. Don’t stop inside the circle to let someone enter from a side street, because the driver behind you is expecting continuous flow and the chain reaction can cause a rear-end collision.
Two-Lane Roundabouts
A multi-lane roundabout changes the calculation. You have to yield to traffic in both circulating lanes before entering, not just the lane closest to you. A vehicle in the inner lane is easy to miss, and misjudging that gap is one of the more common entry mistakes.
Pick your lane before the yield line. The general rule is right lane for the first exits (less than halfway around) and left lane if you’re going farther.5Federal Highway Administration. Roundabouts: An Informational Guide Many roundabouts paint spiral markings that carry you to the right exit if you entered the correct lane. Changing lanes inside the circle isn’t permitted. Signal before your exit so drivers behind you and those waiting to enter can read your path.
Pedestrians and Bicyclists
Crosswalks at a modern roundabout sit back from the circle, usually at least a car length behind the yield line, so you can stop for a pedestrian without blocking the circulating roadway.5Federal Highway Administration. Roundabouts: An Informational Guide You yield to pedestrians in those crosswalks both when entering and when exiting. A raised splitter island between the entry and exit lanes gives them a refuge to cross one direction at a time.
Bicyclists have two choices. They can dismount and use the pedestrian crosswalks, or they can take the travel lane and ride through the circle as a vehicle. A cyclist in the lane has the same right of way as a car, and you should not try to pass them inside the roundabout. Some roundabouts offer bicycle approach ramps that let riders exit the roadway before the circle and rejoin as pedestrians; follow any signage telling you to watch for that merging traffic.
Emergency Vehicles
An ambulance, fire truck, or police vehicle running lights and sirens overrides the normal rules. What you do depends on where you are when you notice it.
- If you haven’t entered the roundabout yet, don’t enter. Pull to the right and stop, keeping the entrance clear.
- If you’re already circulating, keep going to your nearest exit, then pull to the right past the splitter island and stop until the emergency vehicle has passed.
Stopping inside the circle is the worst option. It blocks the curved roadway and can trap the emergency vehicle behind you. Clear the intersection first, then yield.
If You Miss Your Exit
Go around again. Stay in your lane, keep circulating counterclockwise, and take the exit on your next pass. Don’t stop, don’t back up, and don’t cut across lanes to catch an exit you’ve already gone past.
Who’s at Fault If There’s a Crash
Because the entering driver has the legal duty to yield, they carry the burden in most roundabout collisions. Under the Uniform Vehicle Code, a crash between an entering vehicle and one already in the intersection is prima facie evidence that the entering driver failed to yield.4National Committee on Uniform Traffic Laws and Ordinances. Uniform Vehicle Code Millennium Edition That isn’t an automatic finding of liability, but the entering driver starts with the presumption against them.
Other common patterns play out differently. Rear-end collisions inside the circle usually fall on the following driver for not keeping distance. Sideswipes in multi-lane roundabouts typically go against the driver who changed lanes or drifted out of their marked path. Exit-point crashes often involve a driver cutting across the outer lane on the way out. Insurers and courts look at vehicle positions, damage patterns, signs, witnesses, and any dashcam footage. Most states apply some form of comparative fault, so responsibility can be split based on each driver’s contribution to the crash.