Roundabouts

By the end of this topic you can

• You can read the signs and markings on the approach and choose the right lane.
• You can slow down and yield to traffic already circulating.
• You can enter at a safe gap and travel counterclockwise without stopping inside.
• You can signal right and exit safely, watching for pedestrians.
• You can handle an emergency vehicle near a roundabout.

What you need to know and understand

• Traffic in US roundabouts moves counterclockwise.
• Entering drivers yield to traffic already in the roundabout.
• Pedestrians in the crosswalk on the approach or exit have the right-of-way.
• Do not stop inside the roundabout except to avoid a crash.
• Do not pass or drive beside large trucks inside; they may need both lanes.
• If you miss your exit, go around again.
• Urban roundabouts are designed for entry speeds of about 15 to 20 mph, according to IIHS.

Getting through a single-lane roundabout

1. Slow down on the approach and look for the sign showing which exit you need.
2. Stop for anyone in the crosswalk before the yield line.
3. Look left and yield to vehicles and cyclists already circulating.
4. Enter when there is a safe gap, turning right into the circle.
5. Keep moving counterclockwise until you reach your exit. Do not stop or pass.
6. Signal right just before your exit, check for pedestrians, and leave the roundabout.

Choosing a lane in a multi-lane roundabout

Lane-use signs and arrows on the pavement show which lane serves each exit. Pick the lane before you enter, then stay in it until you leave.

In general, the right lane is for turning right or going straight, and the left lane is for going straight, turning left or making a U-turn. California's handbook, for example, says to use the right lane to turn right, and either lane to go straight, leaving in the same lane you entered. Always follow the markings at the roundabout you are using, because layouts differ.

• Avoid changing lanes inside the circle.
• Never drive beside a truck in the roundabout.
• Watch for cyclists who may merge into the lane or use the sidewalk.

Emergency vehicles and roundabouts

If you hear a siren before you enter, pull to the right and stay out of the roundabout. If you are already inside, do not stop in the circle. Continue to your exit, leave, then pull over to the right and let the emergency vehicle pass.

Common mistakes

• Stopping at the yield line when the circle is clear. Yield means slow and look, then go if it is safe.
• Forgetting to look for people in the crosswalk on the exit. Check before and as you leave.
• Changing lanes or cutting across inside a multi-lane roundabout. Choose your lane early.
• Stopping inside the circle because you are unsure of the exit. Go around again instead.
• Not signaling when you leave. Use your right signal before your exit.

Test yourself: Roundabouts

Answer each question, then read the explanation. Questions come in a random order each time.