Estimation of entry capacity for single-lane modern roundabouts: Case study in Queensland, Australia

Xiaobo Qu, Liang Ren, Shuaian Wang, Erwin Oh

Research output: Journal article publicationJournal articleAcademic researchpeer-review

21 Citations (Scopus)


Single-lane modern roundabouts are one of the most important intersection types in the suburbs of Australia. Therefore, it is important to estimate their entry capacities. In this case study, an analytical model based on the gap acceptance theory by incorporating the effects of the exiting vehicles is proposed. Then, a scenario analysis is carried out to assess the effects of the exiting indicators. This is followed by the discussion of the applicability of the proposed model. The results show that the transport authorities need to strictly enforce the use of indicators before exiting in order to achieve higher capacity.
Original languageEnglish
Article number05014002
JournalJournal of Transportation Engineering
Issue number7
Publication statusPublished - 1 Jan 2014
Externally publishedYes


  • Conflicting circulating flow
  • Entry capacity
  • Gap acceptance theory
  • Roundabout

ASJC Scopus subject areas

  • Civil and Structural Engineering
  • Transportation

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