Scheduling Buses to Take Advantage of Transit Signal Priority

Author:

Altun Selman Z.1,Furth Peter G.2

Affiliation:

1. Kittelson & Associates, Inc., Suite 800, 33 North Stone Avenue, Tucson, AZ 85701.

2. Department of Civil and Environmental Engineering, Northeastern University, 400 SN, 360 Huntington Avenue, Boston, MA 02115.

Abstract

Transit signal priority can improve bus operations when it is applied to a route without making any changes to its route design or management; however, benefits can be greater if service design and management policies are purposely altered to take advantage of transit signal priority. Service design issues include generating carefully constructed schedules for use with conditional priority and deciding whether to locate stops on the near side or far side of intersections. Management issues include using conditional priority as a means to give priority only to late buses and deciding whether to hold buses at bus stops until a scheduled departure time, in case conditional priority itself does not offer the desired level of operational control. An optimal level of aggressiveness in the running time schedule is sought as a balance between mean running time with and without priority, assuming that priority will be conditional. With a more aggressive schedule, buses will be late and therefore will request (and get) priority more often; however, a more aggressive schedule also offers less slack to compensate for random delays. Analysis uses both a spreadsheet-based simulation model and a traffic microsimulation model that account for random delays at dispatch and at traffic signals, the effect of crowding on dwell time, and choice of priority and operational control tactics. It is found that optimal performance uses conditional priority and holding, but with an aggressive schedule, leading to substantial reductions in mean running time, standard deviation of running time, headway irregularity, and crowding.

Publisher

SAGE Publications

Subject

Mechanical Engineering,Civil and Structural Engineering

Reference7 articles.

Cited by 28 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Coordinated Transit Signal Priority and Vehicle Guidance for Automated Buses;IEEE Access;2024

2. Conditional Signal Priority for Connected Transit Vehicles at Urban Arterial Roads;2023 IEEE 26th International Conference on Intelligent Transportation Systems (ITSC);2023-09-24

3. Progression Control Model to Enhance Performance of Transit Signal Priority;IEEE Access;2022

4. Multi-Modal Traffic Signal Control in Shared Space Street;IEEE Transactions on Intelligent Transportation Systems;2022-01

5. Sensitivity Analysis of the Transit Signal Priority Requesting Threshold and the Impact on Bus Performance and General Traffic;Transportation Research Record: Journal of the Transportation Research Board;2021-01-15

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