Development of Methodology for Traffic Signal Timing Optimization Schedule

Project No: 72283

Target Completion Date: November 16, 2005 Safety, Operations, and Traffic Engineering

About the project:

Most research efforts in traffic signal control have been dedicated signal timing optimization development while little research has been conducted to determine appropriate schedule for re-optimizing timing plans. This research will develop a methodology for optimally determining signal timing optimization schedules. Using a case study analysis, this project will look at various factors, including traffic counts and/or turning percentages, and determine how they might trigger or influence a schedule for re-optimizing a current signal timing plan. The proposed methodology will be able to determine key factors (e.g., traffic counts at certain major intersections) and timing (or schedule) for re-optimization. For example, the results from this project could yield a methodology that recommends that xx percent increase in traffic counts at key intersections would indicate a need to re-optimize the current timing plan. By monitoring trends of traffic counts data from deployed ITS system such as NOVA MIST, traffic engineers could then trigger when to re-optimize the current signal timing plan. Such a tool would allow VDOT to operate its signal timing plans at optimal conditions. The proposed methodology will be developed and tested through a subsystem of the Northern Virginia signal system. It is anticipated that the methodology will be easily transferable to other traffic signal systems in the Commonwealth.

Project Team

Principal Investigators

Last updated: July 5, 2023

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