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📘 How does a roundabout move traffic?

See how yielding, curved paths, gap acceptance, and conflict reduction move traffic.

lessons

~10 min

to learn

🔬 Science

subject

Adults

level

Start the course →

What you’ll learn

The circle
Yielding
Conflict points
Deflection
Capacity
Exiting
Pedestrians and bicycles
Truck movement
Operations
The complete movement

Questions this course answers

Who has priority at a modern roundabout entry?

Entering traffic yields to vehicles already in the circulating roadway.

What does approach deflection do?

Curved approaches reduce speed and guide vehicles into the circular path.

What mainly controls entry capacity?

Entry opportunities depend on conflicting circulating traffic and geometric factors.

Why is a pedestrian crossing set back from the circle?

Set-back crossings and splitter islands simplify the crossing into separate decisions.

What is a truck apron for?

Large vehicles can mount the apron to negotiate the tight central curve.

Grounded in trusted sources

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