Dynamic Evolution Simulation of Bus Bunching Affected by Traffic Operation State

Bus bunching often occurs in public transit system, resulting a series of problems such as poor punctuality, long waiting time and low service quality. In this paper, we explore the influence discrete distribution traffic operation state on dynamic evolution bus bunching. Firstly, use self-organizing map (SOM) to find threshold analyze factors that affect based GPS data No. 600 line Xi'an. Then, taking headway research index, construct mechanism model. Finally, simulation platform is built by MATLAB examine trend when various influencing show different states along line. terms factors, inter vehicle speed, queuing at intersection loading station are shown have significant impact between buses. crowded road sections headway, long-distance concentrated will lead large interval or When randomly distributed among crowded, normal free, may fluctuate range, which result bunching, small range remain relatively stable. The change curve determined length each results can help formulate improvement measures according for equilibrium alleviating