Citation

Troutbeck RJ. Transp. Res. Rec. 1993; 1398: 68-74.

Copyright

(Copyright © 1993, Transportation Research Board, National Research Council, National Academy of Sciences USA, Publisher SAGE Publishing)

DOI

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PMID

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Abstract

The Australian design standards for traffic circles were developed during the last decade. Early standards borrowed heavily from British research and techniques as well as the Australian practices for analyzing and designing unsignalized intersections. Recently, techniques for analyzing the performance of a traffic circle have been developed from Australian empirical relationships for gap-acceptance parameters as a function of traffic circle geometry. This has improved the ability to account for differences resulting from the geometric design. The design of traffic circles in Australia is a function of their use which may be different from other countries. Locations where and reasons why traffic circles are likely to be effective are described. In addition, the Australian technique for analyzing traffic circle performance by estimating capacity and average delay is described. The main geometric design principles are outlined as well. Traffic circles are considered to be safe intersection control devices; accident experience at traffic circles is also described.

Record URL:
http://onlinepubs.trb.org/Onlinepubs/trr/1993/1398/1398-010.pdf

Language: en

Keywords

Traffic control; Traffic signals; Standards; Performance; Motor transportation; Highway systems; Traffic surveys; Highway service areas