System optimal dynamic traffic assignment in congested networks with advanced information systems PDF Download

Author: Srinivas Peeta
Publisher:
ISBN:
Category : Intelligent transportation systems
Languages : en
Pages : 574

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Author: Nathan H. Gartner
Publisher: Springer Science & Business Media
ISBN: 3642796419
Category : Business & Economics
Languages : en
Pages : 376

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Book Description
The problems of urban traffic in the industrially developed countries have been at the top of the priority list for a long time. While making a critical contribution to the economic well being of those countries, transportation systems in general and highway traffic in particular, also have detrimental effects which are evident in excessive congestion, high rates of accidents and severe pollution problems. Scientists from different disciplines have played an important role in the development and refinement of the tools needed for the planning, analysis, and control of urban traffic networks. In the past several years, there were particularly rapid advances in two areas that affect urban traffic: 1. Modeling of traffic flows in urban networks and the prediction of the resulting equilibrium conditions; 2. Technology for communication with the driver and the ability to guide him, by providing him with useful, relevant and updated information, to his desired destination.

Author: Wei Shen
Publisher:
ISBN:
Category :
Languages : en
Pages :

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The system optimal dynamic traffic assignment (SO-DTA) problem determines the time-dependent traffic flow pattern that minimizes the total system cost in a road network. This problem is of great importance for benchmarking and designing diverse congestion alleviation strategies. Despite its great importance, SO-DTA for large-scale general networks remains one of the most challenging problems in transportation research. Solutions with conventional optimization methods are often problematic, due to the high dimensionality and non-convexity of the formulations. This dissertation focuses on the SO-DTA problem with a single destination (S-SO-DTA), which is the building block for solving the general SO-DTA problem. Using a graph-theoretic approach, we reveal the intrinsic connection between the S-SO-DTA problem and the minimum cost flow (MCF) problem in graph theory. It is demonstrated that non-convexity and high-dimensionality, the two major obstacles for solving the S-SO-DTA problem, can be decoupled and tackled separately by relaxation and transformation techniques. The entire decoupling process uncovers a series of interesting and insightful properties, which give birth to a two-stage innovative solution procedure for the S-SO-DTA problem. The first stage solves a special minimum cost flow problem by an augmented network simplex method, while the second stage transforms an optimal traffic flow pattern of the minimum cost flow problem to an optimal traffic flow pattern of the S-SO-DTA problem by applying a pseudo dynamic network loading procedure. By exploiting specialties of network structure, this two-stage procedure is capable of efficiently obtaining global optimal solutions for large-scale S-SO-DTA problems. An extended version of the S-SO-DTA problem, the S-SO-DTA problem with departure time choice, is also discussed. It is shown that most of the graph-theoretic properties as well as the solution procedure can be easily extended with minor modifications. Finally, this thesis work also investigates the potential applications of the S-SO-DTA results in a variety of operational contexts, including emergency evacuation, access control in monocentric networks, and dynamic congestion pricing. Guidelines for designing efficient dynamic traffic management measures are provided.

Author: Terry L. Friesz
Publisher: Springer Science & Business Media
ISBN: 0387727787
Category : Business & Economics
Languages : en
Pages : 509

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Book Description
This book has been written to address the increasing number of Operations Research and Management Science problems (that is, applications) that involve the explicit consideration of time and of gaming among multiple agents. It is a book that will be used both as a textbook and as a reference and guide by those whose work involves the theoretical aspects of dynamic optimization and differential games.

Author: R. L. Smith
Publisher:
ISBN:
Category : Traffic assignment
Languages : en
Pages : 29

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Author: Michael Patriksson
Publisher: Courier Dover Publications
ISBN: 0486802272
Category : Mathematics
Languages : en
Pages : 244

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Book Description
This monograph provides both a unified account of the development of models and methods for the problem of estimating equilibrium traffic flows in urban areas and a survey of the scope and limitations of present traffic models. The development is described and analyzed by the use of the powerful instruments of nonlinear optimization and mathematical programming within the field of operations research. The first part is devoted to mathematical models for the analysis of transportation network equilibria; the second deals with methods for traffic equilibrium problems. This title will interest readers wishing to extend their knowledge of equilibrium modeling and analysis and of the foundations of efficient optimization methods adapted for the solution of large-scale models. In addition to its value to researchers, the treatment is suitable for advanced graduate courses in transportation, operations research, and quantitative economics.

Author: Pushkin Kachroo
Publisher: Springer
ISBN: 3319692313
Category : Technology & Engineering
Languages : en
Pages : 291

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Book Description
This book develops a methodology for designing feedback control laws for dynamic traffic assignment (DTA) exploiting the introduction of new sensing and information-dissemination technologies to facilitate the introduction of real-time traffic management in intelligent transportation systems. Three methods of modeling the traffic system are discussed: partial differential equations representing a distributed-parameter setting; continuous-time ordinary differential equations (ODEs) representing a continuous-time lumped-parameter setting; and discreet-time ODEs representing a discrete-time lumped-parameter setting. Feedback control formulations for reaching road-user-equilibrium are presented for each setting and advantages and disadvantage of using each are addressed. The closed-loop methods described are proposed expressly to avoid the counter-productive shifting of bottlenecks from one route to another because of driver over-reaction to routing information. The second edition of Feedback Control Theory for Dynamic Traffic Assignment has been thoroughly updated with completely new chapters: a review of the DTA problem and emphasizing real-time-feedback-based problems; an up-to-date presentation of pertinent traffic-flow theory; and a treatment of the mathematical solution to the traffic dynamics. Techinques accounting for the importance of entropy are further new inclusions at various points in the text. Researchers working in traffic control will find the theoretical material presented a sound basis for further research; the continual reference to applications will help professionals working in highway administration and engineering with the increasingly important task of maintaining and smoothing traffic flow; the extensive use of end-of-chapter exercises will help the graduate student and those new to the field to extend their knowledge.

Author: Bikash Gautam
Publisher:
ISBN:
Category : Electronic traffic controls
Languages : en
Pages :

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Author: Xiaojian Nie
Publisher:
ISBN:
Category :
Languages : en
Pages : 720

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Book Description

Author: Ryuichi Kitamura
Publisher: Springer Science & Business Media
ISBN: 0387241094
Category : Business & Economics
Languages : en
Pages : 406

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Book Description
Simulation Approaches in Transportation Analysis: Recent Advances and Challenges presents the latest developments in transport simulation, including dynamic network simulation and micro-simulation of people’s movement in an urban area. It offers a collection of the major simulation models that are now in use throughout the world; it illustrates each model in detail, examines potential problems, and points to directions for future development. The reader will be able to understand the functioning, applicability, and usefulness of advanced transport simulation models. The material in this book will be of wide use to graduate students and practitioners as well as researchers in the transportation engineering and planning fields.