使用浮动车检测OD矩阵的算法及可靠性分析

An Algorithm to Estimate OD Matrix with Probe Vehicle and Its Reliability Analysis

回顾了国内外估算实时OD矩阵现状,提出了用浮动车检测实时OD矩阵的方法.采用最小二乘法给出了现有估算模型的证明过程,指出其存在的问题是估算模型假设浮动车与全部运营车辆比例为恒定的.为此,作者给出了浮动车与运营车辆比例随OD对变化的估算模型,并建立了求解该问题的算法,同时建立了求解估算OD矩阵可靠性的方法,最后,介绍了算法在北京的应用实例.

The paper reviews the current research situation of OD estimation, and puts forward the method using floating vehicle to estimate a time_dependent OD matrix. The least square method is used to prove the existing OD_independent model; however, shortcomings of the model also are pointed out. An improved model dealing with OD_independent model is put forward. Based on the work, the paper develops a more accurate OD_dependent model, and then explains how to solve the model and measure its reliability. Finally, application of the algorithm in Beijing is explained.