A dynamic transit flow estimation model based on congested schedule-based transit equilibrium assignment is proposed using observations from stop count data. A solution algorithm is proposed for the mathematical program with schedule-based transit equilibrium constraints (MPEC) with computational complexity of O(N^2 L) where N and L represent the number of stops and transit lines respectively. The equilibrium constraints corresponding to the schedule-based hyperpath flow is adapted from the literature with some modifications to fit it into an estimation problem. Computational experiments are conducted first to verify the methodology with two synthetic data sets (one of which is Sioux Falls), followed by a validation of the method using bus data from Qingpu District in Shanghai, China from July 1, 2016, with 4 bus lines, 120 segments, 55 bus stops, and 120 one-minute intervals; this is one of the largest implementation of the schedule-based assignment model with congestion effects in the literature and the first for passenger flow estimation based on it. The estimation model converged to 0.005 tolerance of relative change in 10 iterations. The estimated average of segment flows are only 2.5% off from the average of the observed segment flows; relative errors among segments are 42.5%, which compares well with OD estimation methods applied to real data in the literature (e.g. Irvine network, Brescia motorway).
翻译:利用来自点数数据的观测结果,提出了基于基于超速时间表的过境平衡分配的动态中转流估计模型; 提出了基于基于超偏差流的动态中转流量估计模型; 提出了基于超偏差流的动态中转流量模型; 利用来自超速计数数据的观测结果, 提出了基于超速计数的动态中转流估计模型; 为具有基于超速计平衡限制的数学方案(MPEC)提出了一种解决方案算法, 其计算复杂度分别为O(N2L)和O(N2L), 其中N(N2L)和L分别代表中转线数和中转线。 根据文献调整了与基于超速表表的超偏差相对流动相关的平衡模型, 以适应于估算问题。 计算模型的计算方法先是两个合成数据集(其中之一是苏福尔斯),然后是使用中国上海青浦区公交数据的方法验证。 2016年7月1日,,, 以4条公交线、120条路段、55条公交车站、120分钟间间隔120个和120分钟间间间隔120个; 这是基于文献的基于文献和首次数据估算,这是最大的计算方法。