Simulation Modelling of Permitted Left-Turn Saturation Flow Rate Based on Opposing Through-Flow Degree of Saturation

  • Anica Kocić University of Belgrade, Faculty of Transport and Traffic Engineering
  • Nikola Čelar University of Belgrade, Faculty of Transport and Traffic Engineering
  • Stamenka Stanković University of Belgrade, Faculty of Transport and Traffic Engineering
  • Jelena Kajalić University of Belgrade, Faculty of Transport and Traffic Engineering
DOI: https://doi.org/10.7307/ptt.v34i3.3890
Keywords: permitted left turn, saturation flow rate, degree of saturation, signalised intersection, simulation

Abstract

This paper presents the modelling of the saturation flow rate of the permitted left turn in an exclusive lane. In the proposed model, the total permitted left-turn saturation flow rate is determined as a sum of saturation flow rates during the effective green time and the intergreen period. Primarily, the permitted left-turn saturation flow rate during the effective green time is modelled based on the opposing through-flow degree of saturation and the number of opposing through-flow lanes. The relation between the permitted left-turn saturation flow during the effective green time and these variables was examined using data from the simulation experiments in VISSIM. To our knowledge, this is the first study of the permitted left-turn saturation flow modelling based on the opposing through-flow degree of saturation instead of the opposing through-flow rate and signal-timing parameters. The proposed model was validated based on data collected at seven intersections with a permitted left turn served in an exclusive lane. The permitted left-turn saturation flow rate could be accurately determined based on the opposing through-flow degree of saturation and the number of opposing lanes according to the RMSE of 58.4 pcu/h.

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Published
2022-06-01
How to Cite
1.
Kocić A, Čelar N, Stanković S, Kajalić J. Simulation Modelling of Permitted Left-Turn Saturation Flow Rate Based on Opposing Through-Flow Degree of Saturation. Promet [Internet]. 2022Jun.1 [cited 2024Apr.20];34(3):475-8. Available from: https://traffic.fpz.hr/index.php/PROMTT/article/view/3890
Issue
Vol 34 No 3 (2022)
Section
Articles

Copyright (c) 2022 Anica KOCIĆ, Nikola ČELAR, Stamenka STANKOVIĆ, Jelena KAJALIĆ

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