Study On The Influence Range Of Signal Intersection Based On Cellular Automata

This paper mainly focuses on the influence range of signal lamp on the signal intersection.First of all,this paper put the brake light model which considers the driving state of the front car into the two-lane model.The paper also consider the actual situation of road traffic flow,that vehicles on the road will be divided to public buses,large cars and cars,and on this basis,building a signal intersection mixing traffic flow model to research the queue length and delay to determine its scope.Secondly,established the corresponding model,which considers increasing the bus not Bay station at signalized intersection's imported lane,and discuss the impacts of buses' stop on the signalized intersection.Specifically,the main contents of this paper are as follows:(1)Applying improved brake lamp model in signal intersection of two lane of mixed traffic flow model,which contains the road traffic volume,light length and average queue length and the average number of parking within one second.Then getting a result about effects that are affected by a signal lamp under different conditions.Furthermore,the simulation results show that when there has no bus stations on the signal import Road intersection,the change of bus number makes no effects on queue on signalized intersection.(2)On the basis of the above,adding no bay bus station to signal intersection of two lane of mixed traffic flow model,which contains the road traffic volume,light length and average queue length and the average number of parking within one second.By changing the rate of bus coming,researching the relationship among the bus number,the average queue length and average number of stops,we found that increasing bus number will cause the increase in the average number of stops per second,but the average queue length did not change significantly;Researching the relationship between the dwell time and the average queue length by changing the dwell time,found that bus station location has influence on the average queue length and the average number of parking;Researching the relationship among bus station position setting,the average queue length and the number of stops by changing no bay bus station position setting,the study found that the bus station position setting make point on the influence of bus station position of signalized intersection on its largest queue length.Finally,giving the scale of signal lamp when there are no bay bus stations exist on signal intersection entrance and achievement of three service level,and reasonable suggestions about how to set bus station position on signal intersection are proposed.(3)By comparing these two models from the space time diagram,the average queue length and average number of stops,concludes that the difference between the two is due to bus stop on no bay bus station and the heresy bus stop of waiting parking lane change.