State Department of Transportation Support for Operationalizing Transit Signal Priority

Mohammadian, Abolfazl; Miralinaghi, Mohammad; Talebpour, Alireza; Askari, Sajad; Kazemzadehazad, Sanaz

Permalink

https://hdl.handle.net/2142/128603 Copy

Description

Title

State Department of Transportation Support for Operationalizing Transit Signal Priority

Author(s)

• Mohammadian, Abolfazl
• Miralinaghi, Mohammad
• Talebpour, Alireza
• Askari, Sajad
• Kazemzadehazad, Sanaz

Issue Date

2025-06

Keyword(s)

• Traffic Signal Priority
• Deployment Challenges
• Implementation Barriers
• Interagency Coordination Issues
• Regulatory Constraints

Date of Ingest

2025-06-03T11:05:25-05:00

Abstract

Transit signal priority (TSP) systems have become an integral part of regional intelligent transportation systems integration. They modify signal operations to facilitate faster transit through intersections, improve transit service reliability, reduce delays, and enhance overall transit operational efficiency. Agencies are planning and implementing next-generation TSP systems. However, multifaceted challenges complicate TSP implementation, particularly in urban regions with high traffic density and multiple stakeholders. Exploring these challenges can help develop more efficient deployment strategies and improve system performance. This study’s researchers, therefore, examined TSP implementation challenges in the metropolitan Chicago area and interviewed stakeholders and experts from Illinois and other states to identify successes and obstacles in TSP deployment. They applied a thematic analysis and a non-negative matrix factorization method to identify key barriers. To prioritize these challenges, they developed a survey using the fuzzy analytic hierarchy process framework and had experts directly involved in TSP operations in the Chicago region participate in this survey. Study findings indicated that organizational factors—such as interagency coordination issues and labor shortages—are significant challenges. Regulatory and policy constraints, including the absence of standardized regional guidelines and concerns over equipment compatibility, further hinder TSP deployment. Financial constraints, particularly the reliance on fragmented funding sources, create uncertainty in project execution. Technological limitations, such as integration difficulties with legacy traffic control systems and the high costs of infrastructure upgrades, also impede implementation.

Publisher

Illinois Center for Transportation/Illinois Department of Transportation

Has Part

ISSN: 0197-9191

Series/Report Name or Number

FHWA-ICT-25-005

Type of Resource

text

Genre of Resource

technical report

Language

eng

DOI

https://doi.org/10.36501/0197-9191/25-005

Sponsor(s)/Grant Number(s)

IDOT-R27-259

Copyright and License Information

No restrictions. This document is available through the National Technical Information Service, Springfield, VA 22161.

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