National Academies Press: OpenBook
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Suggested Citation:"Front Matter." National Academies of Sciences, Engineering, and Medicine. 2020. Decision-Making Guide for Traffic Signal Phasing. Washington, DC: The National Academies Press. doi: 10.17226/25905.
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Suggested Citation:"Front Matter." National Academies of Sciences, Engineering, and Medicine. 2020. Decision-Making Guide for Traffic Signal Phasing. Washington, DC: The National Academies Press. doi: 10.17226/25905.
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Suggested Citation:"Front Matter." National Academies of Sciences, Engineering, and Medicine. 2020. Decision-Making Guide for Traffic Signal Phasing. Washington, DC: The National Academies Press. doi: 10.17226/25905.
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Below is the uncorrected machine-read text of this chapter, intended to provide our own search engines and external engines with highly rich, chapter-representative searchable text of each book. Because it is UNCORRECTED material, please consider the following text as a useful but insufficient proxy for the authoritative book pages.

NCHRP Web-Only Document 284: Decision-Making Guide for Traffic Signal Phasing Christopher Daily Mike Tantillo PilJin Chun Noelle Wilcox Chuck Conran VHB Richmond, VA Michael Cynecki Randy Dittberner Lee Engineering Phoenix, AZ Craig Lyon Persaud and Lyon Toronto, Canada David Noyce Madhav Chitturi Boris Claros Rodriguez University of Wisconsin Madison, WI Final Draft Guidebook for NCHRP Project 03-118 Submitted December 2019 NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM Systematic, well-designed, and implementable research is the most effective way to solve many problems facing state departments of transportation (DOTs) administrators and engineers. Often, highway problems are of local or regional interest and can best be studied by state DOTs individually or in cooperation with their state universities and others. However, the accelerating growth of highway transportation results in increasingly complex problems of wide interest to highway authorities. These problems are best studied through a coordinated program of cooperative research. Recognizing this need, the leadership of the American Association of State Highway and Transportation Officials (AASHTO) in 1962 initiated an objective national highway research program using modern scientific techniques—the National Cooperative Highway Research Program (NCHRP). NCHRP is supported on a continuing basis by funds from participating member states of AASHTO and receives the full cooperation and support of the Federal Highway Administration (FHWA), United States Department of Transportation, under Agreement No. 693JJ31950003. COPYRIGHT INFORMATION Authors herein are responsible for the authenticity of their materials and for obtaining written permissions from publishers or persons who own the copyright to any previously published or copyrighted material used herein. Cooperative Research Programs (CRP) grants permission to reproduce material in this publication for classroom and not-for-profit purposes. Permission is given with the understanding that none of the material will be used to imply TRB, AASHTO, FAA, FHWA, FTA, GHSA, NHTSA, or TDC endorsement of a particular product, method, or practice. It is expected that those reproducing the material in this document for educational and not-for-profit uses will give appropriate acknowledgment of the source of any reprinted or reproduced material. For other uses of the material, request permission from CRP. DISCLAIMER The opinions and conclusions expressed or implied in this report are those of the researchers who performed the research. They are not necessarily those of the Transportation Research Board; the National Academies of Sciences, Engineering, and Medicine; the FHWA; or the program sponsors. The information contained in this document was taken directly from the submission of the author(s). This material has not been edited by TRB.

The National Academy of Sciences was established in 1863 by an Act of Congress, signed by President Lincoln, as a private, non- governmental institution to advise the nation on issues related to science and technology. Members are elected by their peers for outstanding contributions to research. Dr. Marcia McNutt is president. The National Academy of Engineering was established in 1964 under the charter of the National Academy of Sciences to bring the practices of engineering to advising the nation. Members are elected by their peers for extraordinary contributions to engineering. Dr. John L. Anderson is president. The National Academy of Medicine (formerly the Institute of Medicine) was established in 1970 under the charter of the National Academy of Sciences to advise the nation on medical and health issues. Members are elected by their peers for distinguished contributions to medicine and health. Dr. Victor J. Dzau is president. The three Academies work together as the National Academies of Sciences, Engineering, and Medicine to provide independent, objective analysis and advice to the nation and conduct other activities to solve complex problems and inform public policy decisions. The National Academies also encourage education and research, recognize outstanding contributions to knowledge, and increase public understanding in matters of science, engineering, and medicine. Learn more about the National Academies of Sciences, Engineering, and Medicine at www.nationalacademies.org. The Transportation Research Board is one of seven major programs of the National Academies of Sciences, Engineering, and Medicine. The mission of the Transportation Research Board is to provide leadership in transportation improvements and innovation through trusted, timely, impartial, and evidence-based information exchange, research, and advice regarding all modes of transportation. The Board’s varied activities annually engage about 8,000 engineers, scientists, and other transportation researchers and practitioners from the public and private sectors and academia, all of whom contribute their expertise in the public interest. The program is supported by state transportation departments, federal agencies including the component administrations of the U.S. Department of Transportation, and other organizations and individuals interested in the development of transportation. Learn more about the Transportation Research Board at www.TRB.org.

C O O P E R A T I V E R E S E A R C H P R O G R A M S CRP STAFF FOR NCHRP WEB-ONLY DOCUMENT 284 Christopher J. Hedges, Director, Cooperative Research Programs Lori L. Sundstrom, Deputy Director, Cooperative Research Programs B. Ray Derr, Senior Program Officer Anthony Avery, Senior Program Assistant Eileen P. Delaney, Director of Publications Natalie Barnes, Associate Director of Publications Jennifer Correro, Assistant Editor NCHRP PROJECT 03-118 PANEL Field of Traffic—Area of Operations and Control Mark Luszcz, Delaware Department of Transportation, Smyrna, DE (Chair) Danielle C. Bolan, Montana Department of Transportation, Helena, MT (retired) Michael P. Hunter, Georgia Institute of Technology (Georgia Tech), Atlanta, GA Randall K. Laninga, Illinois Department of Transportation, Peoria, IL (retired) Khang M. Nguyen, City of Houston Department of Public Safety, Houston, TX Robert Rausch, TransCore ITS, LLC, Richmond, TX Mitsuru Saito, Brigham Young University, Provo, UT Ida van Schalkwyk, Washington Department of Transportation, Olympia, WA Lei Q. Wang, Louisiana Department of Transportation and Development, Baton Rouge, LA Bruce Friedman, FHWA Liaison (retired) Richard A. Cunard, TRB Liaison ACKNOWLEDGMENTS The research reported here was performed under NCHRP Project 03-118 by VHB, Lee Engineering, Persaud and Lyon, and the University of Wisconsin. VHB was the prime contractor for this study. Mr. Chris Daily, P.E., Transportation Manager at VHB, was the Project Director and Principal Investigator. The other authors of this report are Mr. Mike Tantillo, Transportation Engineer at VHB; Mr. PilJin Chun, Transportation Analyst at VHB; Ms. Noelle Wilcox, Transportation Analyst at VHB; Mr. Chuck Conran, Transportation Analyst at VHB; Mr. Michael Cynecki, P.E., PTOE, Project Manager at Lee Engineering; Mr. Randy Dittberner, P.E., PTOE, Senior Project Manager at Lee Engineering; Dr. Bhagwant Persaud at Persaud and Lyon, Mr. Craig Lyon, Director at Persaud and Lyon; Dr. David Noyce, Professor and Executive Associate Dean at University of Wisconsin; Dr. Madhav Chitturi, Associate Researcher at University of Wisconsin; Dr. Boris Claros Rodriguez, Research Assistant at University of Wisconsin.

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Few resources provide information related to selecting the most appropriate traffic signal phasing for the various geometric and operational situations encountered in the field. This is especially true for left-turn signal phasing decisions with respect to the level of control for the left-turn movement and whether left turns should precede or follow the main through movement.

The TRB National Cooperative Highway Research Program's NCHRP Web-Only Document 284: Decision-Making Guide for Traffic Signal Phasing is designed to give professionals designing or operating signalized intersections the tools they need to provide safe and efficient overall operations, considering both crash risk and movement delays.

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