关键词: 城市交通, 欠采样, 定位技术, 交叉口, 控制延误

Abstract:

Many transit agencies have deployed global position (GPS) systems on a portion of their transit vehicle fleets. Data from the system are often used for service performance reporting and for service planning. Considering the cost of data storage and transmission and functional requirement, the sampling interval of these GPS data are30sec. Because of the low sampling rata, the bus GPS data are rarely used to estimate intersection delay. In order to make full use of these available data and improve the efficiency and lower the cost of intersection delay calculation, this paper proposes a method by these archived sub-sampling bus GPS data to measure the mean of transit vehicle control delay caused by signalized intersections. To identify signalized intersection delay, this paper analyzed vehicles’running characteristics at signalized intersection and proposed vehicles’acceleration and deceleration models based on sub-sampling bus GPS data. The proposed method is demonstrated with data of straight-line direction of buses at signalized intersection. The results suggest that the proposed method has practical application for the identification of signalized intersection delay.

Key words: urban traffic, sub-sampling, positioning technology, intersections, control delay