Arterial traffic signal optimization: A person-based approach

Authors

Eleni Christofa
Konstantinos Ampountolas
Alexander Skabardonis

Document Type

Journal Article

Publication Date

2015

Subject Area

place - north america, place - urban, mode - bus, mode - car, infrastructure - bus/tram priority, infrastructure - traffic signals

Keywords

Person-based traffic signal control, Transit signal priority, Person delay, Mixed-Integer Linear Programming, Conflicting transit routes, Pairwise signal optimization

Abstract

This paper presents a real-time signal control system that optimizes signal settings based on minimization of person delay on arterials. The system’s underlying mixed integer linear program minimizes person delay by explicitly accounting for the passenger occupancy of autos and transit vehicles. This way it can provide signal priority to transit vehicles in an efficient way even when they travel in conflicting directions. Furthermore, it recognizes the importance of schedule adherence for reliable transit operations and accounts for it by assigning an additional weighting factor on transit delays. This introduces another criterion for resolving the issue of assigning priority to conflicting transit routes. At the same time, the system maintains auto vehicle progression by introducing the appropriate delays associated with interruptions of platoons. In addition to the fact that it utilizes readily available technologies to obtain the inputs for the optimization, the system’s feasibility in real-world settings is enhanced by its low computation time. The proposed signal control system is tested on a four-intersection segment of San Pablo Avenue arterial located in Berkeley, California. The findings show the system’s capability to outperform pretimed (i.e., fixed-time) optimal signal settings by reducing total person delay. They have also demonstrated its success in reducing bus person delay by efficiently providing priority to transit vehicles even when they travel in conflicting directions.

Rights

Permission to publish the abstract has been given by Elsevier, copyright remains with them.

Comments

Transportation Research Part C Home Page:

http://www.sciencedirect.com/science/journal/0968090X

Recommended Citation

Christofa, E., Ampountolas, K., & Skabardonis, A. (2015). Arterial traffic signal optimization: A person-based approach. Transportation Research Part C: Emerging Technologies, Available online 29 December 2015. In Press, Corrected Proof — Note to users.