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Optimization Of Traffic Signal Change Interval
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Book Synopsis Optimization of Traffic Signal Change Interval by : Robert H. Wortman
Download or read book Optimization of Traffic Signal Change Interval written by Robert H. Wortman and published by . This book was released on 1986 with total page 78 pages. Available in PDF, EPUB and Kindle. Book excerpt: Utilizing data from field studies of intersections in Arizona and information from the literature, an indepth examination of the traffic signal change interval was undertaken. The examination included a review of the traditional concept and theory on which the determination of the change interval has been based and an evaluation of the applicability of this theory.
Book Synopsis Optimization of Traffic Signal Change Intervals by : Robert H. Wortman
Download or read book Optimization of Traffic Signal Change Intervals written by Robert H. Wortman and published by . This book was released on 1986 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Traffic Signal Timing Manual by : U.s. Department of Transportation
Download or read book Traffic Signal Timing Manual written by U.s. Department of Transportation and published by CreateSpace. This book was released on 2015-02-20 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Determining Vehicle Signal Change and Clearance Intervals by :
Download or read book Determining Vehicle Signal Change and Clearance Intervals written by and published by . This book was released on 1994 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A History of the Yellow and All-red Intervals for Traffic Signals by : Kimberly A. Eccles
Download or read book A History of the Yellow and All-red Intervals for Traffic Signals written by Kimberly A. Eccles and published by . This book was released on 2001 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Timing Yellow and All-red Intervals at Signalized Intersections by : Hugh W. McGee
Download or read book Guidelines for Timing Yellow and All-red Intervals at Signalized Intersections written by Hugh W. McGee and published by Transportation Research Board. This book was released on 2012 with total page 93 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Investigation of Schedules for Traffic Signal Timing Optimization by : Byungkyu Park
Download or read book Investigation of Schedules for Traffic Signal Timing Optimization written by Byungkyu Park and published by . This book was released on 2005 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis A Two Stage Interval-valued Neutrosophic Soft Set Traffic Signal Control Model for Four Way Isolated signalized Intersections by : Endalkachew Teshome Ayele
Download or read book A Two Stage Interval-valued Neutrosophic Soft Set Traffic Signal Control Model for Four Way Isolated signalized Intersections written by Endalkachew Teshome Ayele and published by Infinite Study. This book was released on 2020-12-01 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the major problems of both developed and developing countries is traffic congestion in urban road transportation systems. Some of the adverse consequences of traffic congestion are loss of productive time, delay in transportation,increase in transportation cost,excess fuel consumption, safety of people,increase in air pollution level and disruption of day-to-day activities. Researches have shown that among others, traditional traffic control system is one of the main reasons for traffic congestion at traffic junctions. Most countries through out the world use pre-timed / fixed cycle time traffic control systems. But these traffic control systems do not give an optimal signal time setting as they do not take into account the time dependent heavy traffic conditions at the junctions. They merely use a predetermined sequence or order for both signal phase change and time setting. Some times this also leads to more congestion at the junctions. As an improvement of fixed time traffic control method, fuzzy logic traffic control model was developed which takes into account the current traffic conditions at the junctions and works based on fuzzy logic principle under imprecise and uncertain conditions. But as a real life situation,in addition to uncertainty and impreciseness there is also indeterminacy in traffic signal control constraints which fuzzy logic can not handle. The aim of this research is to develop a new traffic signal control model that can solve the limitations of fixed time signal control and fuzzy logic signal control using a flexible approach based on interval-valued neutrosophic soft set and its decision making technique, specially developed for this purpose.We have developed an algorithm for controlling both phase change and green time extension / termination as warranted by the traffic conditions prevailing at any time.
Book Synopsis National Signal Timing Optimization Project by :
Download or read book National Signal Timing Optimization Project written by and published by . This book was released on 1982 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Guidelines for Determining Traffic Signal Change and Clearance Intervals by : Institute of Transportation Engineers
Download or read book Guidelines for Determining Traffic Signal Change and Clearance Intervals written by Institute of Transportation Engineers and published by . This book was released on 2015-01 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis National Signal Timing Optimization Project by :
Download or read book National Signal Timing Optimization Project written by and published by . This book was released on 1982 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report summarizes the results of the National Signal Timing Organization Project initiated by the Federal Highway Administration as a fuel conservation effort. The objectives of this project are: 1) to establish credible data on the effectiveness of signal timing optimization; 2) to make signal timing optimization projects easier to do; and 3) to define the resources (cost, level of staff, computer, etc.) required to undertake a signal timing optimization project, so that traffic engineers and administrators can more effectively budget for this activity. The project consisted of the development of the TRANSYT-7F signal timing optimization program User's Manual, and training course, and application of the program in 11 cities nationwide to evaluate the effectiveness of the poptimized signal timing plans and to collect data on the needed resources.
Book Synopsis Analysis of Traffic Signal Change Intervals by : Ralph A. Batenhorst
Download or read book Analysis of Traffic Signal Change Intervals written by Ralph A. Batenhorst and published by . This book was released on 1987 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Optimum Time Intervals for the Traffic Signal Re-timing Process by : Radha Krishna Swayampakala
Download or read book Optimum Time Intervals for the Traffic Signal Re-timing Process written by Radha Krishna Swayampakala and published by . This book was released on 2004 with total page 110 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Traffic Signal Change Intervals by :
Download or read book Traffic Signal Change Intervals written by and published by . This book was released on 2004 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Development and Evaluation of GA-based Time-of-day Intervals Optimization Program for Traffic Signal Control by :
Download or read book Development and Evaluation of GA-based Time-of-day Intervals Optimization Program for Traffic Signal Control written by and published by . This book was released on 2003 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Application of the Stochastic Optimization Method in Optimizing Traffic Signal Control Settings by : Byungkyu Park
Download or read book Application of the Stochastic Optimization Method in Optimizing Traffic Signal Control Settings written by Byungkyu Park and published by . This book was released on 2008 with total page 42 pages. Available in PDF, EPUB and Kindle. Book excerpt: Traffic congestion has greatly affected not only the nation's economy and environment but also every citizen's quality of life. A recent study shows that every American traveler spent an extra 38 hours and 26 gallons of fuel per year due to traffic congestion during the peak period. Of this congestion, 10% is attributable to improper operations of traffic signals. Surprisingly, more than a half of all signalized intersections in the United States needs to be re-optimized immediately to maintain peak efficiency. Even though many traffic signal control systems have been upgraded from pre-timed controllers to actuated and adaptive controllers, the traffic signal optimization software has not been kept current. For example, existing commercial traffic signal timing optimization programs including SYNCHRO and TRANSYT-7F do not optimize advanced controller settings available in the modern traffic controllers including minimum green time, extension time, and detector settings. This is in part because existing programs are based on macroscopic simulation tools that do not explicitly consider individual vehicular movements. To overcome such a shortcoming, a stochastic optimization method (SOM) was proposed and successfully applied to a signalized corridor in Northern Virginia. This study presents enhancements made in the SOM and case study results from an arterial network consisting of 16 signalized intersections. The proposed method employs a distributed computing environment (DCE) for faster computation time and uses a shuffled frog-leaping algorithm (SFLA) for better optimization. The case study results showed that the proposed enhanced SOM method, called SFLASOM, improved the total network travel times over field settings by 3.5% for Mid-Day and 2.1% for PM-Peak. In addition, corridor travel times were improved by 2.3% to 17.9% over field settings. However, when the new SOM timing plan was compared to the new field timing plan implemented in July 2008, the improvements were marginal, showing slightly over 2% reductions in individual vehicular delay.
Book Synopsis Traffic Signal Timing Optimization in Large Networks by : Nicholas J. Vlahos
Download or read book Traffic Signal Timing Optimization in Large Networks written by Nicholas J. Vlahos and published by . This book was released on 1987 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt:
