Analysis Of Delay At Urban Signalized Intersections

Vehicle delay at signalized intersections is the important measure of running efficiency and server quality. It reflects not only the drivers discomfort, restrain, oil consume, time lose, but also reflects the logical of signal control and design. This paper mainly analyzes control delay at urban signalized intersections. Based on the survey data, this paper talks about vehicles movement characteristics of arrival and depart process, then the queueing headway distribution is obtained, and the suggestion that saturated flow should be measured from the sixth queuing vehicle is offered. Using random process theory analysis and computer simulation, the queuing length distribution model is obtained. By using coordinate transform technique, new control delay model is put forward. Because the left turn movement is different from the straight movement, the left turn movement delay is also mentioned. The variance of delay, another important statistics model is studied. Then the potential application is argued. At last, The relationship among stopped delay, approach delay and control delay are studied and linear model are building. Concretely, This paper constitutes of seven parts. The first part is a summary, which simply introduces the study background, contents and some concepts. The second part mainly reviewed the study history, actualities and existinbg problem. This is helpful for the model building, variables selecting and parameter estimating, hi the third part, the arrival process and serve process are studied based on the survey data, especially the delay process is mainly analyzed including the dispersion vehicle headway time distribution. The forth part analyzes the vehicle delay at signalized intersections. Based on the queuing theory is, new delay model is brought forward. Then the model is modified and parameters are estimated by simulated data. After talking about the effect factors, the model is compared with existing famous models. The left turn vehicle delay model is simply studied too. hi the fifth chapter, the delay distribution characters are discussed. Delay variance models are obtained. Models applications are talked about. The sixth part focuses on the relationship among stopped delay, approach delay and control delay. At last, the paper work and findings are summarized. The future work is also suggested.