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在分析OD反推技术在公路工程可行性研究中应用的必要性、可行性之后,指出了OD反推技术应用中的三个关键技术问题,即观测路段的选取、种子OD的确定和分配方法的选择。然后结合TransCAD交通软件,在实际工程案例中对这些关键技术问题进行探讨,并提出了基于GIS的路段重要度的分析法来解决观测路段选取的问题。研究表明路段重要度的分析法快速有效地选取观测路段,OD反推技术的应用能大大减轻工可的调查工作量并提高预测精度,在工程实践中具有重要的价值。
After analyzing the necessity and feasibility of applying OD backpropagation technology to the feasibility study of highway engineering, three key technical problems in the application of OD backpropagation technology are pointed out: the selection of observing road segments, the determination and allocation of seed OD s Choice. Then, combined with TransCAD traffic software, these key technical issues are discussed in practical engineering cases. And the analysis method of road section importance based on GIS is proposed to solve the problem of selecting road sections. The research shows that the analysis method of road section importance can select the observation section quickly and effectively. The application of OD backstepping technology can greatly reduce the workable survey workload and improve the prediction accuracy, which is of great value in engineering practice.