Differences between the Austroads Roundabout Guide and aaSIDRA roundabout analysis methods

The roundabout capacity analysis method used in aaSIDRA was originally based on the method described in ARRB Special Report SR 45 which was introduced into aaSIDRA with some variations and extensions. The SR 45 method was also incorporated into the AUSTROADS (1993) Roundabout Guide with some minor modifications. Subsequently, significant enhancements were introduced in various versions of aaSIDRA, including some important changes introduced in the latest version aaSIDRA 2.1, based on further research and development. This paper presents a summary of the differences between the AUSTROADS Roundabout Guide and aaSIDRA methods for roundabout capacity and performance analysis, and discusses some important aspects of the analysis method where significant differences exist.


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  • Accession Number: 01389863
  • Record Type: Publication
  • Source Agency: ARRB
  • Files: ITRD, ATRI
  • Created Date: Aug 23 2012 3:46AM