The Optimization of Intersection Signal in the Situation of Data Loss

摘要

There is a problem of intersection detector data missing in many cities because of various reasons, such as construction damage, line failure, raining, snowing or fogging, and processing errors, which will inevitably bring adverse effects on traffic flow data analysis as well as deep data mining. As a result, the signal timing plan at the intersection will be unreasonable which will exacerbate the problem of traffic jam. The intersection of Pingan Road and Xingfu Street was taken as an example, which has a critical defect problem of data missing. Experiment and analysis were made, and tireless efforts were tried to implement assumption and completion from the minimum to maximum for the southern traffic data. What's more, based on the traditional timing model calculation of Webster and HCM, the initial optimization plan can be drawn, and then, the total delay was taken as the evaluation index. Furthermore, comparison between the suggested timing plan with verification and data processing via VISSIM software and current timing plan will also be carried out. Based on this, simulation experiment in different timing plan and flow will also be carried out, and the result will be matrix-arranged. Finally, a timing plan with relatively small delay for the whole intersection was hoped to be find out no matter the southern direction traffic flow and without field investigation.