Optimum Time Intervals For The Traffic Signal Re Timing Process
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Optimum Time Intervals For The Traffic Signal Re Timing Process
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Author : Radha Krishna Swayampakala
language : en
Publisher:
Release Date : 2004
Optimum Time Intervals For The Traffic Signal Re Timing Process written by Radha Krishna Swayampakala and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with categories.
One of the most growing concerns in urban areas is the excessive traffic congestion and delay at signalized intersections. Transportation agencies are now faced with ever increasing demands to find quick and permanent solutions to these problems. Reviewing signal timing for adequacy and re-timing the signal plans at frequent intervals can help solve them. Traffic signal optimization is found to be the most cost-effective way to reduce congestion, stops, delays, and fuel consumption. Although research to date clearly presented the benefits of traffic signal optimization, it has failed to address a key issue: the timeframe required for signal re-timing. This study is aimed at determining the optimum timeframe required for signal re-timing, which would account for both the financial costs of re-timing and the economic loss incurred due to traffic delays. Several signalized intersections with varying volumes and characteristics in different cities of North Carolina were selected and the data required for the signal analysis was collected. Using SYNCHRO, signal delays were estimated at all the intersections for time periods of five to seven years, for both the existing and optimized timing plans. A comparative study based on the analysis concluded that re-timing the signals at intervals of 24-30 months would provide the maximum benefits in terms of signal delay as well as the re-timing costs.
Traffic Signal Retiming Practices In The United States
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Author : Robert L. Gordon
language : en
Publisher: Transportation Research Board
Release Date : 2010
Traffic Signal Retiming Practices In The United States written by Robert L. Gordon and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Technology & Engineering categories.
TRB's National Cooperative Highway Research Program (NCHRP) Synthesis 409: Traffic Signal Retiming Practices in the United States explores practices that operating agencies currently use to revise traffic signal timing. The report examines the processes used to develop, install, verify, fine-tune, and evaluate the plans--
Investigation Of Schedules For Traffic Signal Timing Optimization
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Author : Byungkyu Park
language : en
Publisher:
Release Date : 2005
Investigation Of Schedules For Traffic Signal Timing Optimization written by Byungkyu Park and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2005 with Electronic traffic controls categories.
Traffic signal optimization is recognized as one of the most cost-effective ways to improve urban mobility; however the extent of the benefits realized could significantly depend on how often traffic signal re-optimization occurs. Using a case study from the Northern Virginia Smart Traffic Signal System (NVSTSS), this project sought to determine how often traffic signals need to be re-optimized to provide the greatest benefits. This project developed a new traffic signal timing plan evaluation and optimization program by combining the Integrated SYNCHRO and Platoon Dispersion (ISAPD) model and the OptQuest optimization program. Based on 2001 (base scenario) and 2004 traffic data, five scenarios of re-optimization time intervals (i.e., 2 weeks, 4 weeks, 8 weeks, 16 weeks, and 1 year) were investigated. Study results indicate that (1) determining time intervals for re-optimization in the NVSTSS is feasible; (2) among the various re-optimization time intervals investigated for the Route 50 case study network, the time interval of 1 year was the best for both midday and the PM peak; and (3) the annual net savings from implementing this 1-year re-optimization time interval could be as high as $107,340 and $254,436, respectively, given the assumptions used in the study. The report recommends (1) the annual re-optimization of the Route 50 corridor traffic signal system; (2) the NVSTSS implementation of the combined ISAPS and OptQuest program for measuring "regrets" of not maintaining the optimal timing plan; (3) the adoption by VDOT traffic engineers of the methodology developed in this study, which is based on the combined ISAPD and OptQuest program, for making decisions regarding traffic signal re-optimization; and (4) a future study to investigate the impact of traffic volume growth rates and changes in turning movements as a means of assisting with determinations about traffic signal timing plan re-optimization.
A History Of The Yellow And All Red Intervals For Traffic Signals
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Author : Kimberly A. Eccles
language : en
Publisher:
Release Date : 2001
A History Of The Yellow And All Red Intervals For Traffic Signals written by Kimberly A. Eccles and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Technology & Engineering categories.
Signal Timing Practices And Procedures
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Author : Philip J. Tarnoff
language : en
Publisher:
Release Date : 2004
Signal Timing Practices And Procedures written by Philip J. Tarnoff and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Technology & Engineering categories.
Signal Timing Manual
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Author : Thomas Urbanik
language : en
Publisher:
Release Date : 2015
Signal Timing Manual written by Thomas Urbanik and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with Electronic traffic controls categories.
"TRB's National Cooperative Highway Research Program (NCHRP) Report 812: Signal Timing Manual - Second Edition, covers fundamentals and advanced concepts related to signal timing. The report addresses ways to develop a signal timing program based on the operating environment, users, user priorities by movement, and local operational objectives. Advanced concepts covered in the report include the systems engineering process, adaptive signal control, preferential vehicle treatments, and timing strategies for over-saturated conditions, special events, and inclement weather. An overview PowerPoint presentation accompanies the report." --
Guidelines For Timing Yellow And All Red Intervals At Signalized Intersections
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Author : Hugh W. McGee
language : en
Publisher: Transportation Research Board
Release Date : 2012
Guidelines For Timing Yellow And All Red Intervals At Signalized Intersections written by Hugh W. McGee and has been published by Transportation Research Board this book supported file pdf, txt, epub, kindle and other format this book has been release on 2012 with Traffic safety categories.
TRB National Cooperative Highway Research Program (NCHRP) Report 731: Guidelines for Timing Yellow and All-Red Intervals at Signalized Intersections offers guidance for yellow change and all-red clearance intervals at signalized intersections. The guidelines provide a framework that can be easily applied by state and local transportation agencies.
Traffic Signal Timing Manual
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Author : U.s. Department of Transportation
language : en
Publisher: CreateSpace
Release Date : 2015-02-20
Traffic Signal Timing Manual written by U.s. Department of Transportation and has been published by CreateSpace this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-02-20 with Transportation categories.
This report serves as a comprehensive guide to traffic signal timing and documents the tasks completed in association with its development. The focus of this document is on traffic signal control principles, practices, and procedures. It describes the relationship between traffic signal timing and transportation policy and addresses maintenance and operations of traffic signals. It represents a synthesis of traffic signal timing concepts and their application and focuses on the use of detection, related timing parameters, and resulting effects to users at the intersection. It discusses advanced topics briefly to raise awareness related to their use and application. The purpose of the Signal Timing Manual is to provide direction and guidance to managers, supervisors, and practitioners based on sound practice to proactively and comprehensively improve signal timing. The outcome of properly training staff and proactively operating and maintaining traffic signals is signal timing that reduces congestion and fuel consumption ultimately improving our quality of life and the air we breathe. This manual provides an easy-to-use concise, practical and modular guide on signal timing. The elements of signal timing from policy and funding considerations to timing plan development, assessment, and maintenance are covered in the manual. The manual is the culmination of research into practices across North America and serves as a reference for a range of practitioners, from those involved in the day to day management, operation and maintenance of traffic signals to those that plan, design, operate and maintain these systems.
Evaluation Of Signal Timing And Coordination Procedures Field Manual
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Author : E. D. Arnold
language : en
Publisher:
Release Date : 1985
Evaluation Of Signal Timing And Coordination Procedures Field Manual written by E. D. Arnold and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1985 with Traffic signs and signals categories.
The Transyt Signal Timing Reference Book
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Author :
language : en
Publisher:
Release Date : 1981
The Transyt Signal Timing Reference Book written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1981 with Electronic traffic controls categories.