Abstract
The Indiana Department of Transportation (INDOT) manages over 2,000 traffic signals in the State. It is unfeasible to identify systemwide improvement opportunities by evaluating the performance of thousands of traffic signals on monitoring dashboards. This report describes how a scalable technique based on connected vehicle (CV) trajectory data systematically evaluates performance at the movement level to prioritize retiming and maintenance activities. In total, eleven timing changes were implemented at nine traffic signals over various time-of-day (TOD) periods using the proposed approach. The method achieved average control delay and split failure reductions of up to 53 sec/veh and 30%, respectively. A before-after performance analysis is presented for each intersection and the business processes implemented to achieve these results are discussed. The business process analysis resulted in a companion study, SPR-4857, which identified signals with operational performance problems that should be further evaluated for potential capital investments, such as turn lane additions.
Keywords
traffic signal, intersection, performance measure, connected vehicle, big data, retiming
Report Number
FHWA/IN/JTRP-2024/33
SPR Number
4737
Sponsoring Organization
Indiana Department of Transportation
Performing Organization
Joint Transportation Research Program
Publisher Place
West Lafayette, Indiana
Date of Version
2024
DOI
10.5703/1288284317807
Recommended Citation
Saldivar-Carranza, E. D., Platte, T., Wills, T., Sturdevant, J., & Bullock, D. M. (2024). Business processes to prioritize traffic signal retiming and assess the impact of retiming activities (Joint Transportation Research Program Publication No. FHWA/IN/JTRP-2024/33). West Lafayette, IN: Purdue University. https://doi.org/10.5703/1288284317807
Purdue Probe Diagram Video
SPR-4737 Technical Summary.pdf (922 kB)
Technical Summary