Coordinated transit signal priority control with queue length prediction in V2X environments
Journal
Transportation Letters
ISSN
19427867
Date Issued
2025
Author(s)
Huang, Hsin-Kai
Abstract
Transit Signal Priority (TSP) is a control strategy that can reduce the delay of transit systems. However, upon a high traffic volume, TSP may significantly increase delays for non-prioritized vehicles. Furthermore, designing TSP without considering signal coordination may result in ineffective progression for transit vehicles. In recent years, V2X (Vehicle-to-Everything) communications have been built and tested to collect vehicles’ locations and speeds. This study seeks to develop a coordinated TSP control logic in a V2X environment, where additional delays caused by TSP control are calculated with queue length prediction. By adopting a dynamic programming algorithm, the waiting time of transit vehicles and overall delays along the transit route are accounted for to determine the optimal TSP action. The simulated experiment based on a Light Rail Transit (LRT) system shows that the V2X coordinated TSP effectively mitigates the negative impact on general vehicles in non-priority directions upon heavy traffic flows.
Subjects
dynamic programming
queue length prediction
signal coordination
Transit signal priority
V2X
SDGs
Publisher
Taylor and Francis Ltd.
Type
journal article