Roundabouts Guide

Simply stated, a modern roundabout is a transportation management tool that moves traffic through an intersection without the aid of traffic signals. More specifically, a modern roundabout is an intersection with one-way circulation around a central island where entering traffic must yield the right-of-way to the traffic circulating within the roundabout.

Modern roundabouts are superior to old-style traffic circles and to conventional intersections at many locations. They are designed to maximize traffic flow and safety in several ways.

Most frequently asked questions about roundabouts.

When designed correctly roundabouts can significantly reduce the amount of pollutants released into the atmosphere from idling vehicles when compared to signalized intersections.

Current videos and animations that provide helpful tips for navigating roundabouts

There are many myths and misperceptions citizens hear and learn about roundabouts while talking with friends, neighbors and community leaders, or researching the subject matter on the internet.

A modern roundabout is a circular, unsignalized intersection where entering traffic yields to motorists circulating around a central island.

The first traffic circle was the Columbus Circle, built in 1905 in New York City. However, the traffic circles built many years ago are significantly different that today's modern roundabouts.

Roundabouts are being designed and built at intersections all over the United States. This section includes links to websites, books, publications, guidelines, and articles related to roundabouts.