Traffic Signal Optimization Programs
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Application Of The Stochastic Optimization Method In Optimizing Traffic Signal Control Settings
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Author : Byungkyu Park
language : en
Publisher:
Release Date : 2008
Application Of The Stochastic Optimization Method In Optimizing Traffic Signal Control Settings 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 2008 with Stochastic programming categories.
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.
Traffic Signal Optimization Program
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Author : San Diego Association of Governments
language : en
Publisher:
Release Date : 1994
Traffic Signal Optimization Program written by San Diego Association of Governments and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Electronic traffic controls categories.
Traffic Signal Optimization Programs
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Author : Chris Claterbos
language : en
Publisher:
Release Date : 1984
Traffic Signal Optimization Programs written by Chris Claterbos and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1984 with Electronic traffic controls categories.
Test of MAXBAND, SIGOP-III, and TRANSYT-7F on arterials in Lawrence, Kansas, Overland Park, Kansas, and Davenport, Iowa.
Sigop
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Author : Traffic Research Corporation. New York
language : en
Publisher:
Release Date : 1966
Sigop written by Traffic Research Corporation. New York and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with categories.
Evaluation Of Traffic Signal Timing Optimization Methods Using A Stochastic And Microscopic Simulation Program
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Author : Byungkyu Park
language : en
Publisher:
Release Date : 2003
Evaluation Of Traffic Signal Timing Optimization Methods Using A Stochastic And Microscopic Simulation Program 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 2003 with Stochastic programming categories.
This study evaluated existing traffic signal optimization programs including Synchro, TRANSYT-7F, and genetic algorithm optimization using real-world data collected in Virginia. As a first step, a microscopic simulation model, VISSIM, was extensively calibrated and validated using field data. Multiple simulation runs were then made for signal timing plans such that drivers' behavior, day-to-day traffic variation, etc. were considered in the evaluation. Finally, long-term demand growth or changes were statistically modeled and evaluated, again using multiple simulation runs. Five timing plans were evaluated using the simulation test bed. The timing plans under evaluation included (1) the former timing plan of the Virginia Department of Transportation(VDOT), (2) VDOT's current timing plan, (3) the genetic algorithm optimized timing plan, (4)the Synchro optimized timing plan, and (5) the TRANSYT-7F optimized timing plan. The simulation study results indicated that the current practice of VDOT's current signal optimization procedure significantly improved upon its former one by reducing travel times by 17% and total system delay by 36%. The three "optimized" timing plans did not provide significant improvements. Evaluation of the Lee-Jackson Memorial Highway network showed that the current VDOT signal optimization procedure significantly improved the performance of network operations. Thus, the study recommended that VDOT continue using its procedure for developing new timing plans but that it evaluate its signal timing plan regularly so that it does not become outdated
Sigop Traffic Signal Optimization Program
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Author :
language : en
Publisher:
Release Date : 1966
Sigop Traffic Signal Optimization Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1966 with SIGOP. categories.
Optimization Of Large Traffic Systems
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Author :
language : en
Publisher:
Release Date : 1977
Optimization Of Large Traffic Systems written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1977 with Automobiles categories.
Sigop Traffic Signal Optimization Program
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Author : Peat, Marwick, Livingston & Co
language : en
Publisher:
Release Date : 1968
Sigop Traffic Signal Optimization Program written by Peat, Marwick, Livingston & Co and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1968 with SIGOP. categories.
Enhancements To Passer V Signal Timing Optimization Program
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Author :
language : en
Publisher:
Release Date : 2008
Enhancements To Passer V Signal Timing Optimization Program written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Traffic signs and signals categories.
The Texas Department of Transportation (TxDOT) and many other agencies in the U.S. prefer to time their traffic signals to maximize through progression for arterial traffic. Because of this need, the PASSER series of traffic signal timing optimization software has become an important asset to these agencies. The objective of this project is to enhance PASSER V to provide the capability to analyze the impacts of unsignalized intersections, including driveways, located on signalized arterials. In projects including traffic management improvements or access management improvements, different intersections are signalized or unsignalized to achieve various operational or safety improvement objectives. With the additional feature to analyze unsignalized intersections, PASSER V users are able to make side-by-side comparisons between alternatives for these projects.
National Signal Timing Optimization Project
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Author :
language : en
Publisher:
Release Date : 1982
National Signal Timing Optimization Project written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1982 with Automobiles categories.
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.