基于神经网络的高速公路出入口OD矩阵估计方法研究

通过高速公路出入口OD矩阵计算,得到高速公路的断面交通流量,这些数据对于高速公路各项管理措施的制定是非常重要的.针对高速公路出入口OD矩阵推算方法中假设每一留线车辆以等概率驶离高速公路的不足,提出了基于改进BP神经网络的高速公路出入口OD矩阵推算模型,并设计了OD推算神经网络.实例分析表明,该模型推算结果理想,且推算精度得到一定提高.

Method of Expressway Ramp OD Matrix Estimation Based on Neural Network

Obtaining the expressway section traffic by studying expressway ramp OD matrix is very important for drawing up regulations of expressway management. A new expressway ramp OD matrix estimation model was presented based on the modified BP neural network in order to deal with the deficiency of the hypothesis that each vehicle remaining on line moved off the freeway with the same probability. An OD estimation neural network was designed. An example shows that the result of the model is ideal and the estimation accuracy has been somewhat improved.