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Federal Highway Administration Research and Technology
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Research and Development (R&D) Project Sites

Project Information
Project ID:   FHWA-PROJ-09-0013
Project Name:   Real-Time Signal State Transition Software for the Advanced Traffic Controller (06-FH1)
Project Status:   Completed
Start Date:  May 13, 2009
End Date:  December 13, 2011
Contact Information
Last Name:  Gibson
First Name:  David P
Telephone:  202-493-3271
E-mail:  david.gibson@dot.gov
Office:   Office of Operations Research and Development
Team:   Trans Enabling Technologies Team [HRDO-10]
Program:   Small Business Innovation Program (SBIR) (2% of Adjusted CA)
Project detail
Project Description:   National Cooperative Highway Research Program 3-66, has developed a real-time traffic signal State Transition Logic Software. This logic allows local intersection control programs to be aware of the distinctions between different kinds of preempts and the meanings (e.g., the difference between railroad and light rail preempts, fire trucks, ambulances, police, and mass transit vehicle priority requests). This project will develop versions of the National Cooperative Highway Research Program 3-66 logic in C and Ada programming languages¬†to ride to work with Path traffic signal control program logic and the real-time Linux Advanced Transportation Controller operating system for the Advanced Transportation Controller. Objectives of this research study are to: ¬†(1) Examine the state of the art in open source traffic signal controller logic.(2) Convert the Path Logic to run on the prototype development hardware.(3) Develop interactions with traffic simulator for extended testing.(4) Integrate selected elements of the National Cooperative Highway Research Program 3-66 signal state transition logic.
Goals:   The key project objective is to develop a logic for signal state transitions that follows in the footsteps of the National Cooperative Highway Research Program (NCHRP) 3-66.
Background Information:   This project is being done with the cooperation of the Houston Transtar; their signal laboratory is testing the software.
Test Methodology:   Houston Transtar signal laboratory conducted testing with their signal test equipment.
Partners:   U.S. Department of Transportation: Research and Innovative Technology Administration (RITA); Role(s): Other stakeholder
Expected Benefits:   The expected benefit of this study is improved signal state transition algorithms that provide the opportunity for utilizing enhanced traffic and pedestrian sensor data for optimization of both vehicular and pedestrian safety and operations.
Project Findings:   It is possible to develop a software that does signal state transitions in the footsteps of the National Cooperative Highway Research Program (NCHRP) 3-66.
FHWA Topics:   Research/Technologies--FHWA Research and Technology
TRT Terms:   Traffic Signal Preemption
Traffic Signal Control Systems
Highway Traffic Control
Signalized Intersections
FHWA Disciplines:   Operations
Subject Areas:   Operations and Traffic Management


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