How Roundabouts Work: Right-of-Way Rules
Just like waiting for your turn to hop onto a spinning carousel, you always yield to the cars already circulating inside.
Definition A roundabout is a circular intersection where vehicles travel counterclockwise around a central island. Without relying on traffic lights, it keeps traffic flowing smoothly through two simple rules: yield to circulating vehicles and always use your turn signals.
Vehicles Inside Have Right-of-Way
Imagine hopping onto a merry-go-round at an amusement park. To avoid bumping into anyone, you have to wait outside and look for an opening. Roundabouts operate on the exact same principle.
When approaching a roundabout, drivers must slow down or stop before the yield line. Circulating cars already inside the circle have absolute right-of-way. Keeping the inner ring flowing freely is what prevents the entire intersection from gridlocking.
If an entering car cuts in aggressively, the circulating driver has to slam on the brakes. That causes a chain reaction of stops, bottlenecking the whole circle. The basic rule is simple: slow down, wait for circulating traffic to pass, and merge smoothly into an open gap.
Turn Signals Are Your Voice
Since most roundabouts do not have traffic lights, your turn signals are the primary way to communicate your intentions to other drivers. Moving without signaling leaves others guessing, sharply increasing the risk of an accident.
When entering the circle, turning on your left turn signal lets drivers behind you and circulating cars know you are merging into the inner flow.
When preparing to leave, turn on your right turn signal just before reaching your exit. Seeing this signal lets waiting drivers know the circle is clearing, allowing them to enter safely. This simple habit keeps traffic moving efficiently for everyone.
Roundabouts vs. Traffic Circles
Many people confuse old-style traffic circles (or rotaries) with modern roundabouts. However, they are completely different intersection designs with opposite right-of-way rules.
In older traffic circles, entering vehicles had priority. This forced circulating cars to stop and yield to new traffic entering the circle, frequently creating massive gridlock where no one could move.
Modern roundabouts solved this by curving entrance angles to naturally slow drivers down and adding clear yield lines. By giving unconditional right-of-way to circulating traffic, modern roundabouts drastically reduce congestion and cut traffic accidents nearly in half.
๐ค Common misconceptions
Whoever noses their car into the roundabout first gets right-of-way.
Circulating vehicles already inside the circle always have priority, regardless of when you arrived. Entering vehicles must yield at the entry line.
Roundabouts and old-school traffic circles are just different names for the same thing.
Older traffic circles prioritize entering traffic and encourage higher speeds, whereas modern roundabouts prioritize circulating traffic and are designed for low speeds and yielding.
๐งบ Where you meet it
To navigate a roundabout safely, remember just two things: yield to circulating traffic, and use your left signal to enter and right signal to exit.