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
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.

References

HCM 2016: Highway Capacity Manual. Washington, DC: National Research Council, Transportation Research Board; 2016.

Wang M-H, Benekohal RF. Analysis of left-turn saturation flow rates and capacity at signalized intersections. Transportation Research Record. 2010;2173(1): 96–104. doi: 10.3141/2173-12.

Bai Q, et al. A method for determining the capacity of an exclusive left lane with a permitted phase under nonstrict priority. Advances in Civil Engineering. 2019;2019. doi: 10.1155/2019/2357437.

Wu J-WJ. Evaluation and enhancement of opposed left-turn flow analysis methodology. PhD thesis. University of Florida; 1995.

Akçelik R. Traffic signals: Capacity and timing analysis. Australian Road Research Board. Research report ARR No. 123, 1981.

Teply S, Allingham DI, Richardson DB, Stephenson BW. Canadian capacity guide for signalized intersections. 3rd Edition. Toronto, Ontario, Canada: Canadian Institute of Transportation Engineers; 2008.

Niittymäki J, Pursula M. Saturation flows at signal-group-controlled traffic signals. Transportation Research Record. 1997;1572(1): 24–32. doi: 10.3141/1572-04.

Vejdirektoratet. [Manual for capacity and level of service]. 2015.

Bhuiyan NF. Towards performance measure analysis: Development of a left turn saturation flow rate model at signalized intersections. PhD thesis. Claremont Graduate University and California State University Long Beach; 2018.

Chang G-L, Chen C-Y, Perez C. Hybrid model for estimating permitted left-turn saturation flow rate. Transportation Research Record. 1996;1566(1): 54–63. doi: 10.1177/0361198196156600107.

Radičević V, Krstanoski N, Subotić M. New approach to estimating the saturation flow rate of a shared lane with permitted left turns. Promet – Traffic&Transportation. 2020;32(4): 573–583. doi: 10.7307/ptt.v32i4.3458.

Mousa RM. Simulation modeling and variability assessment of delays at traffic signals. Journal of Transportation Engineering. 2003;129(2): 177–185. doi: 10.1061/(ASCE)0733-947X(2003)129:2(177).

Kocić A, Čelar N, Stanković S. [VISSIM calibration for permitted left turn on signalized intersections in Belgrade]. Put i saobraćaj. 2018;64(4): 49–53. doi: 10.31075/PIS.64.04.07.

Kocić A, Čelar N, Kajalić J, Stanković S. [Estimation of saturation flow rates on dual left-turn lanes]. Tehnika. 2018;65(2): 254–261. doi: 10.5937/tehnika1802254K.

Al-Mistarehi B, Alomari A, Al Zoubi M. Investigation of saturation flow rate using video camera at signalized intersections in Jordan. Open Engineering. 2021;11(1): 216–226. doi: 1515/eng-2021-0021.

Webster FV, Cobbe BM. Traffic signals. London: Her Majesty's Stationery Office; 1966.

Fambro DB, Gaston GD, Hoff CM. Comparison of two protected-permitted lead-lag left-turn phasing arrangements. Texas Transportation Institute, Texas A&M University System, College Station Texas. Report: 989-1F, 1991.

Aoyama E, Yoshioka K, Shimokawa S, Morita H. Estimating saturation flow rates at signalized intersections in Japan. Asian Transport Studies. 2020;6. doi: 10.1016/j.eastsj.2020.100015.

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 2022Nov.29];34(3):475-8. Available from: https://traffic.fpz.hr/index.php/PROMTT/article/view/3890
Section
Articles