论文部分内容阅读
为了综合反映城市道路交叉口时空资源利用状况,以物理学外力做功原理为基础,分别建立了单股交通流和整个交叉口的通行效率模型。通过模型变换,将其中一个参数定义为冲突强度,从交通流、冲突点及整个交叉口3个层面分别建立了冲突强度模型。最后通过南京交叉口的具体实例得到冲突强度以及对应的通行效率的散点分布图,运用曲线拟合方法建立了交叉口的通行效率与冲突强度的回归模型,结果表明二者之间的关系可用二次函数加以表达。
In order to comprehensively reflect the utilization of space-time resources in urban road intersections, based on the principle of physical work done by external forces, the traffic efficiency model of single-unit traffic flow and the entire intersection are established respectively. Through the model transformation, one of the parameters is defined as the intensity of conflict, and the conflict strength model is established respectively from the traffic flow, the conflict point and the whole intersection. Finally, through the concrete example of Nanjing intersection, the intensity of conflict and the scatter distribution map of the corresponding traffic efficiency are obtained, and the regression model of traffic efficiency and conflict intensity at the intersection is established by using the curve fitting method. The results show that the relationship between the two can be used Quadratic function to be expressed.