Simulation modeling in GPSS for optimizing the traffic lights cycle of adjustable crossroads

Irina Kravchenya (1) , Iryna Lebid (2)
(1) Department of Road Transport and Traffic Management, Transportation Process Management Faculty, Belarusian State University of Transport, 34, Kirova street, Gomel, 246653, Republic of Belarus , Belarus
(2) Transport and Informational Technologies Faculty, Department of International Transportation and Customs Control, National Transport University, 1, Mykhailа Omelianovycha - Pavlenka Str., Kyiv 01010, Ukraine , Ukraine

Abstract

The problem of traffic management, especially in big cities is particularly actual. Due to unavoidable motorization increase in number of vehicles has resulted in congestion, traffic jams, difficulty of the movement of pedestrians, increasing the number of accidents. Traffic jams are undesirable because of higher fuel consumption, increased pollution due to exhaust gases as well as noise, etc. The only way to avoid harmful consequences is to optimize the operation of the traffic lights cycle. The purpose of the work is creation the simulation model in GPSS for determining the optimal traffic lights cycle at adjustable crossroads when managing vehicle flows with specified intensities. The mathematical model of adjustable crossroads can be presented as a queuing system. Development of the simulation model includes several stages: programming in GPSS, verification and assessment of the adequacy. The algorithm for optimizing the traffic lights cycle and diagrams are used to find the optimal value of the cycle. The minimum intersection travel time (including time of queuing) is selected as the optimal criterion. The object of study is the traffic lights cycle regulation of the intersection Sovietskaya St. – Rogachevskaya St. – Telman St. in Gomel, Belarus. The existing traffic lights cycle regulation at the intersection Sovietskaya str. – Rogachevskaya str. – Telman str. has been studied. Simulation modeling of the intersection has been created in GPSS and traffic light cycle optimization algorithm has been developed. According to a worked out algorithm the traffic lights cycle at research intersection during saturation flux has been improved. Transport delays both at the existing and optimized crossings have been estimated. Optimization of the traffic lights cycle will increase the traffic capacity of the intersection, reduce the volume of toxic emissions and decrease the accident risk. The developed simulation model can be modified for other types of intersections and used as the basis for a decision support system based on low-level simulation.

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References

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Authors

Irina Kravchenya
Iryna Lebid
i.h.lebed@gmail.com (Primary Contact)
Kravchenya, I., & Lebid, I. (2020). Simulation modeling in GPSS for optimizing the traffic lights cycle of adjustable crossroads. Journal of Sustainable Development of Transport and Logistics, 5(1), 48–55. https://doi.org/10.14254/jsdtl.2020.5-1.5

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