现有高速公路收费系统采用原始时间记录数据估计的路段旅行时间不准确，将直接影响路段流量估算准确性． 为此，提出了一种依据轨迹法计算车辆时空坐标轨迹、以路段长度为权重进行路段旅行时间修正的旅行时间估计算法，并将其应用于某高速收费系统数据，验证了经过修正的路段旅行时间估计值更接近于实际路段旅行时间．

In the existing expressway toll collection systems，the estimated section travel time based on original toll records is inaccurate，which may reduce the estimation accuracy of traffic flow． In order to solve this problem，a new travel time estimation algorithm，which calculates the space-time coordinate displacement of vehicles according to the trajectory method and adjusts the travel time by taking the section length as the weight，is proposed． The algorithm is then applied to an expressway toll collection system． The results show that the proposed algorithm helps to obtain an estimated travel time close to the actual one．