The basic approach: enter slowly, yield to traffic already inside, and exit when your street comes up

A roundabout is a circular intersection where traffic flows counterclockwise around a central island. You don't stop at a red light—you yield to vehicles already in the circle, enter when there's a gap, and drive around until your exit appears. The hardest part for most drivers is the yield: traffic inside the roundabout has the right of way, so you wait for a safe opening before you merge in.

The speed is lower than you'd drive on a regular road. Most roundabouts have a posted speed limit between 15 and 25 mph, and you should enter even slower than that—slow enough to stop if a car is still in your path. This isn't a highway merge; it's a controlled, low-speed turn.

Key Takeaways

  • Yield to any vehicle already in the roundabout before you enter, even if you have to wait several seconds for a gap.
  • Stay in the right lane for exits that are less than halfway around the circle, and the left lane for exits past halfway.
  • Signal right when you're about to exit, not when you enter—signaling on entry confuses drivers behind you about which way you're going.
  • If you miss your exit, keep circling; never back up or cross lanes suddenly to leave.
  • Pedestrians and cyclists have the right of way at the entry point, so check before you merge.

Choosing your lane before you enter

Most roundabouts have two lanes. The lane you pick depends on where you're exiting. If your exit is the first, second, or third one ahead (less than halfway around the circle), use the right lane. If your exit is past the halfway point, use the left lane. This matters because it tells drivers around you which direction you're heading and prevents collisions when people are exiting.

Look at the roundabout entrance before you arrive. You'll see lane markings painted on the road showing which lane goes where. Some roundabouts have signs above the lanes listing the streets each one serves. Read these before you're in the yield zone—once you're committed to entering, you shouldn't be switching lanes.

If you're not sure which lane you need, it's better to take the right lane and circle around again than to cut across lanes inside the roundabout. A second loop costs you ten seconds. A lane change in front of another driver costs you a collision.

The moment you enter: yield, merge, and accelerate smoothly

Approach the roundabout at 15 to 20 mph, not faster. Look left to see what's in the circle. If a car is coming toward you on the left side of the entrance, you yield and wait. If the circle is clear or the nearest car is far enough away that you can enter and accelerate before it reaches you, go ahead and merge.

Merge smoothly into your lane without jerking the wheel. You're not making a sharp turn yet—the circle is gradual. Keep your speed steady as you enter. Don't brake hard once you're in the circle; that surprises drivers behind you. If you misjudged and a car is too close, yield and wait for the next gap instead of forcing your way in.

Once you're in, you have the right of way over new traffic trying to enter. Vehicles outside the circle must yield to you. This is why the person entering must be patient—once you're committed, you own your space in the circle.

Navigating the circle and watching for your exit

Drive around the circle at a steady, moderate speed. Don't accelerate hard or brake suddenly. Keep your eyes ahead and to the left so you see the next exit coming. Count the exits as you pass them, or look for street signs. If you entered in the right lane, you'll be in position to exit at the first, second, or third opening. If you're in the left lane, stay there until you reach your exit.

Watch for pedestrians and cyclists crossing at each exit point. They have the right of way, so slow down or stop if someone is in the crosswalk. This is the same rule as a regular intersection—the roundabout doesn't change who yields to whom at the pedestrian crossing.

If you realize you're about to pass your exit, don't panic and don't cut across lanes. Keep circling. You'll come around again in about 20 seconds. It's a minor inconvenience; an unsafe lane change is a crash.

Signaling and exiting correctly

This is where most drivers get it wrong. Do not signal when you enter the roundabout. Signaling right as you merge confuses the driver behind you—they think you're exiting when ready, so they may try to pass you or change lanes. Instead, signal only when you're about to leave.

When your exit is one or two car lengths ahead, signal right. This tells drivers behind you that you're leaving the circle and they should not follow you. Exit smoothly, following the curve of the road out of the roundabout. Once you've cleared the circle, you can accelerate normally.

If you're in the left lane and need to move to the right lane to exit, do this before you reach your exit—not at the last second. Check your mirror and blind spot, signal right, and move over when it's safe. Then signal right again as you approach the actual exit.

Common mistakes and how to avoid them

The most common error is entering without yielding. Drivers see a gap and go, without checking whether a car in the circle is about to pass through that same gap. The rule is straightforward: if you can see a vehicle in the roundabout, yield to it. If the circle looks empty, enter. If you're not sure, wait.

The second mistake is signaling on entry. You'll see drivers do this, and it causes confusion. Enter without signaling. Signal only when you're exiting. This is the opposite of what feels natural, but it's the standard in every country that uses roundabouts.

A third mistake is stopping in the circle. Once you're in, keep moving. The only reason to stop is if a pedestrian is in the crosswalk at your exit. If traffic is backed up and you can't exit, don't enter the circle in the first place. Wait for a gap that lets you all the way through.

Finally, don't try to change lanes inside the circle. If you're in the wrong lane, circle around again. Changing lanes in a roundabout puts you in the blind spot of the car next to you and often causes side-impact collisions.

Multi-lane roundabouts and larger circles

Some roundabouts have three lanes or are very large. The same rules explore, but you have more exits to count and more room to move. In a three-lane roundabout, the right lane is for exits in the first third, the middle lane for exits in the middle third, and the left lane for exits in the final third. Look for lane markings and signs to confirm.

Larger roundabouts feel less tight, which can make drivers go faster. Don't. The speed limit is still 15 to 25 mph, and the yield rules don't change. A bigger circle doesn't mean a faster circle.

If you're unfamiliar with a particular roundabout, it's fine to circle it once to see the layout and find your exit. This is safer than guessing and cutting across lanes.

Frequently Asked Questions

What do I do if I miss my exit?

Keep circling. Do not back up, do not cut across lanes, and do not stop in the circle. You'll come around again in about 20 seconds. Take your exit the second time. It's a minor delay and much safer than any alternative.

Do I need to signal when I enter a roundabout?

No. Signal only when you exit. Signaling on entry tells drivers behind you that you're leaving when ready, which causes confusion and can lead to collisions. Enter without signaling, then signal right as you approach your exit.

What if a pedestrian is crossing at my exit?

Yield to them. Pedestrians have the right of way at the crosswalk, just as they do at a regular intersection. Slow down or stop if needed. Don't try to squeeze past them or assume they'll move out of your way.

Can I change lanes inside the roundabout?

You can, but it's risky. Check your mirror and blind spot, signal, and move only when it's safe. Most drivers find it easier to circle around again if they're in the wrong lane rather than change lanes in the circle.

What if traffic is backed up and I can't fit in the circle?

Don't enter. Wait outside the roundabout until there's a clear path all the way to your exit. Entering and then stopping in the circle blocks other drivers and creates a jam.