Transit Signal Priority (TSP) logic that resolves conflicting TSP requests can reduce bus intersection delay up to 57 percent compared to conventional first-come-first-serve TSP strategies.
A microscopic simulation-based evaluation of an intersection in Charlottesville, Virginia
Made Public Date
03/21/2017

836

Charlottesville
Virginia
United States
Identifier
2017-01132
TwitterLinkedInFacebook

Transit Signal Priority Accommodating Conflicting Requests Under Connected Vehicles Technology

Summary Information

This research used a micro-simulation model (VISSIM) and traffic analysis techniques to evaluate the impacts of enhanced Transit Signal Priority (TSP) at an isolated intersection in Charlottesville, Virginia. Researchers hypothesized that in situations where multiple buses approach simultaneously, enhanced TSP logic can resolve conflicting requests and reduce overall person-delay compared to conventional TSP.

The enhanced system, known as TSPCV-CR (TSP with Connected Vehicles accommodating Conflicting Requests), was designed to maximize transit TSP service rates and minimize adverse effects on competing traffic. The following scenarios were modeled.

  1. Without TSP
  2. Conventional TSP
  3. TSPCV-CR

Performance was evaluated at four congestion levels with three different conflicting scenarios.

KEY FINDINGS

TSPCV-CR reduced single bus delay up to 57 percent, and reduced average bus delay between 5 and 48 percent compared to conventional TSP. The range of improvement reflected volume/capacity ratios between 0.5 and 1.0, respectively.

TSPCV-CR gave preference to buses traveling in the direction with higher volume (major-street) but shifted priority to minor streets at near capacity conditions.

TSPCV-CR sometimes sacrificed the mobility of one bus line in order to achieve an overall reduction in delay.

Researchers indicated that the application could be used in real-time with a computation time of less than one second.

Transit Signal Priority Accommodating Conflicting Requests Under Connected Vehicles Technology

Transit Signal Priority Accommodating Conflicting Requests Under Connected Vehicles Technology
Publication Sort Date
06/01/2016
Author
Hua,Jia; Byungkyu Brian Park; and Young-Jae Lee
Publisher
Transportation Research Part C
Other Reference Number
Vol. 69 (2016), pp173–192

(Our website has many links to other organizations. While we offer these electronic linkages for your convenience in accessing transportation-related information, please be aware that when you exit our website, the privacy and accessibility policies stated on our website may not be the same as that on other websites.)

Application Taxonomy

Goal Areas
Deployment Locations