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The roundabout is a relatively new highway intersection concept that relies upon a circular traffic flow pattern and the use of YIELD control on each approach to the intersection. Since the roundabout is easily confused with other circular intersection types (e.g. traffic circles), this website has been established to provide access to general information, current technical policy and guidance on the topic.
Basic information and the current Caltrans policy is contained in Design Information Bulletin No. 80-01.
Roundabouts: An Informational Guide
A comprehensive source of general and technical information concerned with roundabout installations in the United States is the FHWA publication, ROUNDABOUTS: AN INFORMATIONAL GUIDE, June 2000. This document can be accessed from the FHWA Internet Homepage, under the webpage on Intersection Safety (www.tfhrc.gov/safety/intersect.htm).
This page last updated June 1, 2002