Purpose & Design
A well-designed, strategically placed roundabout has several benefits:
- Slower speeds and less conflict points reduces the frequency and severity of accidents.
- Delays are reduced due to the smooth flow of vehicle traffic rather than the stop-and-go traffic of normal intersections.
- The central island is often landscaped to help beautify the intersection.
There are no traffic signals or stop signs in a roundabout. To keep traffic flowing, most roundabouts have the following design features:
- Yield at Entry
- Traffic entering the roundabout yields the right-of-way to vehicles already in the roundabout.
- One-Way Travel
- Vehicles in a roundabout travel in one direction only (counterclockwise).
- Central Island
- A raised, painted, or landscaped central island.
- Slower Speeds
- Geometric features physically limit vehicle speeds to 25 mph or less.