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Montana Department of Transportation

ROUNDABOUTS

About Roundabouts

Purpose for Roundabouts

History of Roundabouts

How to Use a Roundabout
Motor Vehicle
Bicycle
Pedestrian

Frequently Asked Questions

Roundabout Locations

Why use a Roundabout?
A well designed strategically placed roundabout has several benefits.
  • Safety - Slower speeds and less conflict points reduces the frequency and severity of accidents.


  • Operation - Delays are reduced due to the smooth flow of vehicle traffic rather than the stop-and-go traffic of normal intersections.


  • Aesthetics - The central island is often landscaped to help beautify the intersection.
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