Benefit

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


06/01/2016
Charlottesville; Virginia; United States


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.

Benefit Comments

No comments posted to date

Comment on this Benefit

To comment on this summary, fill in the information below and click on submit. An asterisk (*) indicates a required field. Your name and email address, if provided, will not be posted, but are to contact you, if needed to clarify your comments.



Source

Transit Signal Priority Accommodating Conflicting Requests Under Connected Vehicles Technology

Author: Hua,Jia; Byungkyu Brian Park; and Young-Jae Lee

Published By: Transportation Research Part C

Source Date: 06/01/2016

Other Reference Number: Vol. 69 (2016), pp173–192

URL: http://www.sciencedirect.com/science/article/pii/S0968090X16300614

Rating

Average User Rating

0 ( ratings)

Rate this Benefit

(click stars to rate)


Goal Areas

Mobility

Typical Deployment Locations

Metropolitan Areas, Statewide

Keywords

bus priority, traffic signals, TSP

Benefit ID: 2017-01132