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Gap Acceptance Cycles for Modelling Roundabout Capacity and Performance

Conference paper
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Part of the Lecture Notes in Networks and Systems book series (LNNS, volume 52)

Abstract

Gap-acceptance theory has been used widely for estimation of capacity at unsignalised roundabouts and two-way sign-controlled intersections. This paper discusses the use of the gap-acceptance method beyond modelling capacity. The author has developed gap acceptance capacity and performance models by signal analogy, including the estimation of delay, queue length and stop rates for roundabouts and other unsignalised intersections. These models have been implemented in the SIDRA INTERSECTION software which has been in extensive use in traffic engineering practice. This paper will describe the basic method that uses gap acceptance cycles for modelling performance measures with a focus on the modelling of queue length at roundabouts. A simple single-lane roundabout example is given to explain important aspects of modelling the queue length.

Keywords

Intersection Roundabout Sign control Signals Queue Back of queue Cycle-average queue Delay Stop rate Gap acceptance Critical gap Follow-up headway 

References

  1. 1.
    Akçelik, R.: A review of gap-acceptance capacity models. In: 29th Conference of Australian Institutes of Transport Research, CAITR. University of South Australia, Adelaide. http://eng.monash.edu.au/civil/assets/document/research/centres/its/caitr-home/prevcaitrproceedings/caitr2007/akcelik-caitr2007.pdf
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    Akçelik, R.: Some common and different aspects of alternative models for roundabout capacity and performance estimation. http://www.techamerica.com/RAB11/RAB11Papers/RAB1117Akcelik-0127.pdf
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    Macioszek, E., Akçelik, R.: A Comparison of Two Roundabout Capacity Models. http://techamerica.com/RAB17/RAB17papers/RAB175C_MacioszekPaper.pdf
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    Transportation Research Board: Highway Capacity Manual, 6th edn. Transportation Research Board, National Research Council, Washington (2016)Google Scholar
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Copyright information

© Springer Nature Switzerland AG 2019

Authors and Affiliations

  1. 1.SIDRA SOLUTIONSMelbourneAustralia

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