This report summarizes a report by an ITE technical committee (5B-17), which covers the state of the art in terms of capacity, delay, safety, and geometric design of roundabouts, and includes the results of a survey of operating traffic agencies. The survey summarized, in both qualitative and quantitative terms, roundabout operating parameters and measures of performance, as well as general opinions on roundabouts. The four basic types of roundabouts and their variations are described. It is noted that roundabouts have worked well in Europe and Australia, but not in North America. Local coniditions and driver familiarity and acceptance may be more important determinants of roundabout success than design features. It is recommended that engineers should develop a better understanding of the operation of roundabouts, particularly with regard to driver interaction and traffic flows.

  • Availability:
  • Supplemental Notes:
    • By ITE Technical Council Committee 5B-17.
  • Corporate Authors:

    Institute of Transportation Engineers (ITE)

    Washington, DC  United States 
  • Publication Date: 1992-2

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Filing Info

  • Accession Number: 00618921
  • Record Type: Publication
  • Files: TRIS, ATRI
  • Created Date: Feb 29 1992 12:00AM