Estimating signalized intersection delays to transit vehicles from archived AVL/APC data

摘要

Many transit agencies have deployed automatic vehicle location (AVL) systems and/or automaticpassenger counting (APC) systems on a portion of their fleet of transit vehicles. Data from thesesystems are used for real-time system monitoring and control and archived data are often used forservice performance reporting and for service planning. This paper proposes and demonstrates amethod by which these archived data can be used to estimate the mean and variance of transit vehicledelays caused by signalized intersections.The proposed method is suitable for application to most transit AVL/APC databases and isdemonstrated using data from Grand River Transit, the public transit service provider in the Regionof Waterloo, Ontario Canada.The results obtained from the application to field data indicate that the proposed method is able toexplain 96% of the variation in observed mean transit vehicle delay at signalized intersections.These results suggest that the proposed method has practical application for the identification andprioritization of candidate transit priority measures, including transit signal priority (green extension,early green, special transit phases) and queue jump lanes.