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New York driving lesson · Defensive Driving

Roundabouts

A 3-minute lesson from the New York course. Read the rules and examples, follow the handbook page references, and check your understanding before you move on.

Read time
3 minutes
Course unit
Defensive Driving
Checkpoint questions
5
Source pages
50, 51

A modern roundabout is a circular intersection where traffic moves counterclockwise around a central island and entering traffic yields. Low speeds and curved entrances make roundabouts safer than many ordinary intersections, as long as everyone follows the yield-at-entry rule.

Roundabout parts diagram
A common roundabout design: central island, splitter islands, crosswalks and yield lines

Modern roundabout

A circular intersection with yield control of entering traffic, where traffic moves counterclockwise around a central island.

Handbook p. 50 ↗

Three principles of the modern roundabout:

  • Yield-at-entry: approaching vehicles wait for a gap in the circulating flow before entering
  • Low speeds for entering and circulating traffic, set by small diameters and curved entrances
  • Adequate deflection of entering vehicles is the most important factor in safe operation
Handbook p. 50 ↗
30 mph

Roundabouts are designed to keep all vehicles at or below this speed inside

Handbook p. 50 ↗

Driving into a roundabout:

  • Follow lane signs and pick the proper lane on a multi-lane approach; slow down
  • Yield to pedestrians in the crosswalk
  • Look left: traffic in the roundabout has the right-of-way
  • Enter at the yield line when there's an adequate gap in circulating traffic
  • If a car is waiting at the yield line ahead of you, don't stop in the crosswalk
  • Bicyclists ride in the lane like other vehicles; do not pass a bicycle in the roundabout
Handbook p. 50 ↗

Exiting the roundabout:

  • Once inside, go counterclockwise to your exit; you now have the right-of-way
  • Turn on your right turn signal as you approach your exit
  • Exit, yielding to pedestrians in the crosswalk
Handbook p. 51 ↗

Pedestrians at roundabouts:

  • Stay on designated walkways and cross only at designated crosswalks
  • Never cross to the central island
  • Cross one lane at a time, using the splitter island as a refuge
  • You have the right-of-way, but your own attention is your best protection
Handbook p. 51 ↗

Bicyclists at roundabouts:

  • If comfortable in traffic, take the lane and circulate like a vehicle, yielding when entering
  • Ride at the speed of the circular roadway to discourage cars from passing
  • Use your right-hand signal when you exit
  • If unsure, dismount and walk the bike as a pedestrian at the crosswalks
Handbook p. 51 ↗

Put it into practice

You approach a single-lane roundabout. A car is circling toward you from the left and a pedestrian is in the crosswalk. Yield to both, then enter when there's a gap. Signal right as you near your exit and yield again to anyone in the exit crosswalk.

Check your understanding

Read the question, decide on an answer, then open it to check the explanation. These are Roadwise study questions based on the source handbook.

What is the maximum design speed for vehicles circulating inside a modern roundabout?
  1. 30 mph or less
  2. 45 mph or less
  3. 15 mph or less
  4. There is no design speed limit

Answer: 30 mph or less

Roundabouts are designed so vehicle speed is restricted to 30 mph or less within the circle.

Handbook p. 50 ↗
Approaching a roundabout, who has the right-of-way?
  1. The vehicle approaching from the right
  2. Traffic already circulating
  3. Whichever vehicle arrives first
  4. The vehicle entering from the busier road

Answer: Traffic already circulating

Traffic in the roundabout has the right-of-way over vehicles approaching to enter.

Handbook p. 50 ↗
What must a driver do when approaching a roundabout with lane designation signs for a multi-lane entry?
  1. Always use the rightmost lane
  2. Use the left lane to go straight
  3. Stop fully before the yield line
  4. Follow lane signs to pick your lane

Answer: Follow lane signs to pick your lane

Approaching a multi-lane roundabout, follow the lane designation signs and choose the proper lane for your exit.

Handbook p. 50 ↗
A driver approaching a roundabout must yield to traffic already circulating inside it.
  1. True
  2. False

Answer: True

Traffic already in the roundabout has the right-of-way over vehicles entering.

Handbook p. 50 ↗
Inside a roundabout, you may pass a bicyclist who is riding in the lane.
  1. True
  2. False

Answer: False

Bicyclists may ride in the roundabout lane like other vehicles, and the handbook says not to pass a bicycle in the roundabout.

Handbook p. 50 ↗
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