The Impact of Community Opening on Road Access

摘要

The communityopening has attracted wide attention and discussion. In this paper, two problemsare solved. One is to select appropriate evaluation indexesanddo quantitativelyanalyses for each index. And another one is to establish a traffic index model. For the first problem, three kinds of indexes are chosen to be as the evaluation indexes. They are the number of optimal paths, the average delaysof crossing and the traffic capacity. Through calculatingthenumber of optimal pathsbetween perfect point grids, establishing a delay model, and establishing the traffic capacity model, the impact of community opening on road access can be discussed. It can be concluded that if the number of optimal paths becomes larger, the average delays of crossing becomes smaller and the road capacity becomes larger, the traffic on the surrounding roads will be better. For the second problem, themathematical model which is called traffic index is established. It is based on fuzzy comprehensive evaluation method. Firstly, to define an evaluation set which is {larger, large, medium, small, smaller}. Then, to define a factor set which is {the number of optimal paths, the average delays of crossing, the traffic capacity}. Next, to determine the weight of each factor based on analytic hierarchy process. The set of the weight can be calculated which is (0.8058,-0.1325, 0.326). Lastly, to determine the fuzzy judgment matrix. The community opening on road access can be quantified based on the traffic index. However, a new more accurate and effective model is supposed to be found when the surrounding environment, roads and public facilitiesmake certain changes.