Effective Freeway Traffic Management System
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Effective Freeway Traffic Management System
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Author :
language : en
Publisher:
Release Date : 1971
Effective Freeway Traffic Management System written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Express highways categories.
Developing An Effective Freeway Traffic Management System For Los Angeles
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Author : Bill Schaefer
language : en
Publisher:
Release Date : 1970
Developing An Effective Freeway Traffic Management System For Los Angeles written by Bill Schaefer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1970 with Electronic traffic controls categories.
Planned electronic traffic control measures for Los Angeles freeways: early detection and rapid removal of incidents, electronic surveillance, service for stranded motorists, ramp control, central decision making, and effective real-time information for the motorist.
Evaluation Of The Effectiveness Of Freeway Traffic Management Systems Using Flow Occupancy Diagrams And Capacity Analysis
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Author : Jalil Kianfar
language : en
Publisher:
Release Date : 2013
Evaluation Of The Effectiveness Of Freeway Traffic Management Systems Using Flow Occupancy Diagrams And Capacity Analysis written by Jalil Kianfar and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2013 with Electronic Dissertations categories.
Over the past decades environmental sustainability and mitigating congestion has been a significant challenge in urban areas in many countries. Freeway traffic management systems are aimed to improve traffic conditions by better managing existing freeway facilities. This dissertation presents an evaluation methodology that consists of series of statistical tests to identify the changes in flow-occupancy plot and flow breakdown on freeways. Two-dimensional Kolmogorov-Smirnov test was used to examine the statistical significance of changes in the overall flow-occupancy distribution. Curve-fitting techniques were used to produce before and after flow-occupancy fitted plots. In order to compare the fitted plots, statistical tests were presented to identify if slopes of fitted lines were statistically different. One challenge in creating traffic flow plots is the identification of critical occupancy. An automated procedure based on clustering techniques was presented to alleviate the modeler discretion from identifying the critical occupancy value. The impact of freeway traffic management systems on the probability of flow breakdown was also investigated. A non-parametric product-limit method and parametric Weibull distributions were used to model flow breakdown distributions. The applicability of presented methodologies for evaluating the freeway traffic management systems was illustrated using two case studies; a variable speed limit system in St. Louis, Missouri, and a freeway ramp metering system in the Twin Cities, Minnesota. The two-dimensional Kolmogorov-Smirnov test was illustrated to be useful in identifying the changes in before and after study of flow-occupancy distributions. Clustering techniques were successfully applied to partition traffic data to two regimes and to create flow-occupancy diagrams and to identify flow breakdown. Finally, an examination of the breakdown probability distribution highlighted its values as a more complete performance measure than capacity or critical occupancy.
Freeway Traffic Modelling And Control
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Author : Antonella Ferrara
language : en
Publisher: Springer
Release Date : 2018-04-12
Freeway Traffic Modelling And Control written by Antonella Ferrara and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2018-04-12 with Technology & Engineering categories.
This monograph provides an extended overview of modelling and control approaches for freeway traffic systems, moving from the early methods to the most recent scientific results and field implementations. The concepts of green traffic systems and smart mobility are addressed in the book, since a modern freeway traffic management system should be designed to be sustainable. Future perspectives on freeway traffic control are also analysed and discussed with reference to the most recent technological advancements The most widespread modelling and control techniques for freeway traffic systems are treated with mathematical rigour, but also discussed with reference to their performance assessment and to the expected impact of their practical usage in real traffic systems. In order to make the book accessible to readers of different backgrounds, some fundamental aspects of traffic theory as well as some basic control concepts, useful for better understanding the addressed topics, are provided in the book. This monograph can be used as a textbook for courses on transport engineering, traffic management and control. It is also addressed to experts working in traffic monitoring and control areas and to researchers, technicians and practitioners of both transportation and control engineering. The authors’ systematic vision of traffic modelling and control methods developed over decades makes the book a valuable survey resource for freeway traffic managers, freeway stakeholders and transportation public authorities with professional interests in freeway traffic systems. Advances in Industrial Control reports and encourages the transfer of technology in control engineering. The rapid development of control technology has an impact on all areas of the control discipline. The series offers an opportunity for researchers to present an extended exposition of new work in all aspects of industrial control.
Traffic Control System Improvements
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Author :
language : en
Publisher:
Release Date : 1980
Traffic Control System Improvements written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Electronic traffic controls categories.
The report reviews, synthesizes, and interprets the impacts and costs of urban traffic control system improvements. Four major categories of control system improvements are covered: coordination of traffic signals; optimization of traffic signal timing; advanced computer-based master control systems; and freeway traffic management systems. Project level impacts and areawide impacts are given for various types of traffic control projects and comprehensive combined programs. The current implementation status of the different types of traffic control improvements, institutional impediments, and cost effectiveness is discussed. Special treatment is given to the impacts of improved traffic control on energy consumption.
Intelligent Transportation Systems
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Author : Robert Gordon
language : en
Publisher: Springer
Release Date : 2015-11-02
Intelligent Transportation Systems written by Robert Gordon and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015-11-02 with Technology & Engineering categories.
Intelligent Transportation Systems: Functional Design for Economical and Efficient Traffic Management provides practical guidance on the efficient use of resources in the design of ITS. The author explains how functional design alternatives can meet project objectives and requirements with optimal cost effectiveness and clarifies how transportation planning and traffic diversion principles relate to functional ITS device selections and equipment locations. Methodologies for translating objectives to functional device types, determining device deployment densities and determining the best placement of CCTV cameras and message signs are provided, as are models for evaluating the benefits of design alternatives based on traffic conditions. Readers will learn how to reduce recurrent congestion, improve incident clearance time in non-recurrent congestion, provide real-time incident information to motorists, and leverage transportation management center data for lane control through important new active transportation and demand management (ATDM) methods. Finally, the author examines exciting developments in connected vehicle technologies, exploring their potential to greatly improve safety, mobility and energy efficiency. This resource will greatly benefit all ITS designers and managers and is of pivotal importance for operating agencies performing evaluations to justify operational funding and system expansions.
Intelligent Freeway Transportation Systems
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Author : Robert Gordon
language : en
Publisher: Springer Science & Business Media
Release Date : 2009-10-06
Intelligent Freeway Transportation Systems written by Robert Gordon and has been published by Springer Science & Business Media this book supported file pdf, txt, epub, kindle and other format this book has been release on 2009-10-06 with Technology & Engineering categories.
Intelligent Freeway Transportation Systems: Functional Design focuses on the efficient use of resources in the design of ITS. It discusses the principles of top down design starting with objectives and requirements, and provides guidance for the development and evaluation of functional design alternatives according to cost effectiveness principles. It shows how transportation planning principles such as Wardrop’s Laws and traffic diversion principles relate to functional ITS device selections and equipment locations. Methodologies for translating objectives to functional device types are provided. Application factors to identify device deployment densities (e.g. number of detectors per mile) as a function of traffic conditions are provided, as are evaluation models for evaluating the benefits of design alternatives based on traffic conditions. Design guidance and benefits evaluation include the following functions: (1) Non-recurrent congestion – Improvement of incident clearance time, (2) Non recurrent congestion – Incident information to motorists, (3) Recurrent congestion – Information to motorists, (4) Ramp metering, (5) Motorist service patrols.
Alternative Approaches To Condition Monitoring In Freeway Management Systems
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Author : Rod E. Turochy
language : en
Publisher:
Release Date : 2002
Alternative Approaches To Condition Monitoring In Freeway Management Systems written by Rod E. Turochy and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2002 with Multivariate analysis categories.
In response to growing concerns over traffic congestion, traffic management systems have been built in large urban areas in an effort to improve the efficiency and safety of the transportation network. This research effort developed an automated condition monitoring method that uses archived traffic data to provide a basis for assessing current traffic conditions and, if applicable, determining the degree to which the conditions are abnormal. The method is an improvement over commonly used traffic condition monitoring methods in that the system state is characterized across a range of conditions rather than in an incident or incident-free condition. An additional improvement is that the interrelationships among traffic parameters are exploited by using multivariate statistical quality control (MSQC) rather than analyzing values of mean speed, volume, and occupancy (traffic variables typically measured in a traffic management system) independently. This statistical approach provides the tools and basis for the extensions needed to assess current traffic conditions using historical data. Prototype applications for use in traffic management systems and for data mining purposes were developed. These applications employ a newly developed procedure for screening both current and archived data from traffic detectors to reduce the potential of using erroneous data in the MSQC-based traffic condition monitoring method. Several strategies for sampling the historical database, based on temporal relationships with current data, were developed and evaluated. Implementation of the method will allow traffic managers to focus their efforts on abnormally operating locations and then determine an appropriate course of action to attempt to return the system state to normal. Potential benefits include more efficient use of human and computer resources in traffic management centers, improved return on investment in traffic detection infrastructure, and reduced traffic congestion.
Freeway Management Handbook
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Author : James D. Carvell
language : en
Publisher:
Release Date : 1997
Freeway Management Handbook written by James D. Carvell and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Express highways categories.
This handbook is an update of the 1983 edition and reflects the tremendous developments in computing and communications technology. It also reflects the importance of "Integrated" Transportation Management Systems and the development of the concept of Intelligent Transportation Systems (ITS). The handbook development began with a survey of current practice, including site visits and interviews, of ten Freeway Management Systems throughout the country. It was developed under the advice of a panel of freeway management practitioners. The 1997 edition is organized in modular fashion with each module addressing a particular aspect or technology of the freeway management task. The modules are stand-alone treatments of particular areas of freeway management but are cross-referenced to reflect their interdependence
Freeway Traffic Management
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Author : Donald G. Capelle
language : en
Publisher: Transportation Research Board National Research
Release Date : 1979
Freeway Traffic Management written by Donald G. Capelle and has been published by Transportation Research Board National Research this book supported file pdf, txt, epub, kindle and other format this book has been release on 1979 with Transportation categories.
This publication results from growing concern about increasing congestion on urban freeways. It provides an overview of proven traffic control techniques for reducing congestion and improving operations that will be of interest to highway administrators, legislators, and other public officials concerned with the management and operation of freeway systems. This synthesis of past and present practices describes operational and safety problems typical to an urban freeway corridor, a range of options for dealing with these problems, and guidelines for implementing and operating freeway control systems. The report is based on previous research, actual experience from operating freeway control systems in various parts of the United States, and numerous interviews with individuals having responsibility for those systems. General guidance is provided for the planning and implementation of freeway control projects at the executive and administrative levels.