Advanced Freeway System Ramp Metering Strategies For Texas
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Advanced Freeway System Ramp Metering Strategies For Texas
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Author : Carroll J. Messer
language : en
Publisher:
Release Date : 1993
Advanced Freeway System Ramp Metering Strategies For Texas written by Carroll J. Messer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1993 with Electronic traffic controls categories.
Freeway ramp metering systems have been used to improve urban freeway flow. However, control strategies must be properly adjusted to account for ramp queues overflowing onto surface streets and provide equitable on-ramp control during various operating periods. An improved solution can be obtained by optimizing this problem simultaneously for a group of time slices. This study identifies and examines a microcomputer-based optimization scheme that can assist in developing efficient freeway control strategies for on-line freeway surveillance and control. A multi-level freeway control structure is employed for which ramp metering control algorithms are developed for each level of control. Flow-based and lane occupancy-based system algorithms are presented. Detailed data file requirements are provided for each control level. A microcomputer prototype, or laboratory test version of the system level, will be described in a companion project report.
Ramp Metering Status In North America
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Author : Gary Piotrowicz
language : en
Publisher:
Release Date : 1995
Ramp Metering Status In North America written by Gary Piotrowicz and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Electronic traffic controls categories.
An Advanced Real Time Ramp Metering System Arms The System Concept
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Author : Jyh-Charn S. Liu
language : en
Publisher:
Release Date : 1994
An Advanced Real Time Ramp Metering System Arms The System Concept written by Jyh-Charn S. Liu 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.
Optimization And Microsimulation Of On Ramp Metering For Congested Freeways
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Author : Gabriel Clemente Gomes
language : en
Publisher:
Release Date : 2004
Optimization And Microsimulation Of On Ramp Metering For Congested Freeways written by Gabriel Clemente Gomes and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2004 with Express highway interchanges categories.
This dissertation investigates various aspect of the design and testing of on-ramp metering control systems, including optimization-based control and microscopic freeway modeling. A new technique for generating optimal metering plans is developed. As with most predictive designs, the ramp metering rates are found as the solution to a nonlinear optimization problem. In contrast to previous designs, the new approach 1) produces a globally optimal solution to the nonlinear problem, 2) requires only to solve a single linear program, and 3) allows the enforcement of hard constraints on the on-ramp queue lengths. The price that is paid for these features is that the objective function being minimized is not Total Travel Time, but rather a member of a class of "TTT-like" objective functions. A TTT-like objective function is defined as a linear combination of mainline flows with weights that, similarly to the Total Travel Time cost weights, decrease linearly in time from some initial value to zero at the final time. An example application of the technique shows that the globally optimal metering plan with respect to a TTT-like objective function also performs well in terms of Total Travel Time. A macroscopic analysis of local traffic-responsive ramp metering on a short stretch of freeway, with a single on-ramp and no offramps, is also presented. The study compares the performance of two popular local traffic-responsive ramp metering algorithms: Alinea and Percent-Occupancy, and addresses issues pertaining to parameter tuning and loop-detector placement. The second half of the dissertation describes the construction of a detailed microsimulation model of a stretch of Interstate 210 in Pasadena, CA. The VISSIM microsimulation package was used to create this model. Descriptions of the data gathering and processing procedures, bottleneck identification, network coding, and model calibration are provided. The model is used to test the performance of candidate local traffic-responsive controllers. Questions concerning the relative merits of these controllers, parameter tuning, and loop-detector placement are addressed in the context of the large-scale microscopic model.
Coordination Control Of Distributed Systems
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Author : Jan H. van Schuppen
language : en
Publisher: Springer
Release Date : 2014-09-25
Coordination Control Of Distributed Systems written by Jan H. van Schuppen and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2014-09-25 with Technology & Engineering categories.
This book describes how control of distributed systems can be advanced by an integration of control, communication, and computation. The global control objectives are met by judicious combinations of local and nonlocal observations taking advantage of various forms of communication exchanges between distributed controllers. Control architectures are considered according to increasing degrees of cooperation of local controllers: fully distributed or decentralized control, control with communication between controllers, coordination control, and multilevel control. The book covers also topics bridging computer science, communication, and control, like communication for control of networks, average consensus for distributed systems, and modeling and verification of discrete and of hybrid systems. Examples and case studies are introduced in the first part of the text and developed throughout the book. They include: control of underwater vehicles, automated-guided vehicles on a container terminal, control of a printer as a complex machine, and control of an electric power system. The book is composed of short essays each within eight pages, including suggestions and references for further research and reading. By reading the essays collected in the book Coordination Control of Distributed Systems, graduate students and post-docs will be introduced to the research frontiers in control of decentralized and of distributed systems. Control theorists and practitioners with backgrounds in electrical, mechanical, civil and aerospace engineering will find in the book information and inspiration to transfer to their fields of interest the state-of-art in coordination control.
Integrated Arterial And Freeway Operation Control Strategies For Ivhs Advanced Traffic Management Systems
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Author :
language : en
Publisher:
Release Date : 1998
Integrated Arterial And Freeway Operation Control Strategies For Ivhs Advanced Traffic Management 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 1998 with DYNASMART (Computer file) categories.
The main focus of this study is congestion, primarily that occurring on freeway corridors in metropolitan areas. Lack of coordination in the operation of various components of the system is often a major source of inefficiency, resulting in greater delays to motorists than what might be achievable with the existing physical infrastructure. The main objective of the study is to improve corridor network management by coordinating the various control elements in a freeway corridor, for both recurrent and nonrecurrent congestion situations.
Texas Transportation Researcher
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Author :
language : en
Publisher:
Release Date : 1995
Texas Transportation Researcher written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Transportation, Automotive categories.
A Dual Lane Flow Signal Plan For Texas
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Author : Carroll J. Messer
language : en
Publisher:
Release Date : 1997
A Dual Lane Flow Signal Plan For Texas written by Carroll J. Messer and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Electronic traffic controls categories.
Highway Research Abstracts
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Author :
language : en
Publisher:
Release Date : 1994
Highway Research Abstracts written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1994 with Highway engineering categories.
Adaptive Fuzzy Systems For Traffic Responsive And Coordinated Ramp Metering
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Author : Klaus Bogenberger
language : en
Publisher:
Release Date : 2001
Adaptive Fuzzy Systems For Traffic Responsive And Coordinated Ramp Metering written by Klaus Bogenberger and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2001 with Adaptive control systems categories.