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Author: Wenlong Jin
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
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Book Description
Author: Wenlong Jin
Publisher:
ISBN:
Category :
Languages : en
Pages : 444
Get Book Here
Book Description
Author: Wen-Long Jin
Publisher: Elsevier
ISBN: 0128158417
Category : Transportation
Languages : en
Pages : 284
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Book Description
Introduction to Network Traffic Flow Theory: Principles, Concepts, Models, and Methods provides a comprehensive introduction to modern theories for modeling, mathematical analysis and traffic simulations in road networks. The book breaks ground, addressing traffic flow theory in a network setting and providing researchers and transportation professionals with a better understanding of how network traffic flows behave, how congestion builds and dissipates, and how to develop strategies to alleviate network traffic congestion. The book also shows how network traffic flow theory is key to understanding traffic estimation, control, management and planning. Users wills find this to be a great resource on both theory and applications across a wide swath of subjects, including road networks and reduced traffic congestion. - Covers the most theoretically and practically relevant network traffic flow theories - Provides a systematic introduction to traditional and recently developed models, including cell transmission, link transmission, link queue, point queue, macroscopic and microscopic models, junction models and network stationary states - Applies modern network traffic flow theory to real-world applications in modeling, analysis, estimation, control, management and planning
Author: Nishant Kumar
Publisher:
ISBN:
Category :
Languages : en
Pages :
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Book Description
The Kinematic-wave model is one of the models proposed to simulate vehicular traffic. It has not received widespread use because of poor understanding of associated interface conditions and early use of incorrect numerical schemes used. This thesis analyzes mathematically correct boundary and interface conditions in the context of the Godunov method as the numerical scheme for the simulation software created. This thesis simulates a set of scenarios originally proposed by Ross, to verify the validity of simulation. The results of the simulation are compared against the corresponding results of Ross, and against intuitive expectation of the behavior of actual traffic under the scenarios. Our results tend either to agree with or improve upon those reported by Ross, who used alternate models.
Author: Mauro Garavello
Publisher:
ISBN: 9781601330192
Category : Conservation laws (Mathematics)
Languages : en
Pages : 0
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Book Description
Author: Jeffrey Kent Wiens
Publisher:
ISBN:
Category : Cellular automata
Languages : en
Pages : 0
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Book Description
We apply both cellular automaton (CA) and kinematic wave (KW) models to simulating vehicle traffic. We investigate three different CA models and show how each choice affects the fundamental diagram, which is a plot of the traffic flux versus density. Based on these CA simulations as well as empirical observations in the literature, we propose that the fundamental diagram can be approximated by a piecewise linear function having a discontinuity at a single point. We then construct a KW model that consists of a hyperbolic conservation law for the traffic density with this this discontinuous, non-convex function as the traffic flux function. We then derive the exact solution of the corresponding Riemann problem analytically for general piecewise constant initial data, which requires use of a mollifier to smooth out the discontinuity in the flux function. Another necessary component of the analytical solution is the construction of a convex hull for the mollified problem, which is then considered in the limit as the support of the mollifier goes to zero. Finally, the Riemann solution is used to construct a high resolution finite volume scheme for the KW model, which we use to simulate various traffic scenarios and draw comparisons with not only the CA model but also the analytical solution of the KW problem.
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: Wilhelm Leutzbach
Publisher: Springer Science & Business Media
ISBN: 3642613535
Category : Technology & Engineering
Languages : en
Pages : 210
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Book Description
This book describes a coherent approach to the explanation of the movement of individual vehicles or groups of vehicles. To avoid possible misunderstandings, some preliminary remarks are called for. 1. This is intended to be a textbook. It brings together methods and approaches that are widely distributed throughout the literature and that are therefore difficult to assess. Text citations of sources have been avoided; literature references are listed together at the end of the book. 2. The book is intended primarily for students of engineering. It describes the theoretical background necessary for an understanding of the methods by which links in a road network are designed and dimensioned or by which traffic is controlled; the methods themselves are not dealt with. It may also assist those actually working in such sectors to interpret the results of traffic flow measure ments more accurately than has hitherto been the case. 3. The book deals with traffic flow on links between nodes, and not at nodes themselves. Many readers will probably regret this, since nodes are usually the bottlenecks which limit the capacity of the road network. A book dedicated to the node would be the obvious follow-up. A separation of link and node is justified, however, partly because the quantity of material has to be kept within reasonable bounds and partly because the treatment of traffic flow at nodes requires additional mathematical techniques (in particular, those relating to queueing theory).
Author: William H. K. Lam
Publisher: Springer Science & Business Media
ISBN: 144190820X
Category : Business & Economics
Languages : en
Pages : 743
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Book Description
th It is our great privilege and honor to present the proceedings of the 18 International Symposium on Transportation and Traffic Theory (ISTTT), held at The Hong Kong Polytechnic University in Hong Kong, China on 16-18 July 2009. th The 18 ISTTT is jointly organized by the Hong Kong Society for Transportation Studies and Department of Civil and Structural Engineering of The Hong Kong Polytechnic University. The ISTTT series is the main gathering for the world’s transportation and traffic theorists, and those who are interested in contributing to or gaining a deep understanding of traffic and transportation phenomena in order to better plan, design and manage the transportation system. Although it embraces a wide range of topics, from traffic flow theories and demand modeling to road safety and logistics and supply chain modeling, the ISTTT is hallmarked by its intellectual innovation, research and development excellence in the treatment of real-world transportation and traffic problems. The ISTTT prides itself in the extremely high quality of its proceedings. Previous ISTTT conferences were held in Warren, Michigan (1959), London (1963), New York (1965), Karlsruhe (1968), Berkeley, California (1971), Sydney (1974), Kyoto (1977), Toronto (1981), Delft (1984), Cambridge, Massachusetts (1987), Yokohama (1990), Berkeley, California (1993), Lyon (1996), Jerusalem (1999), Adelaide (2002), College Park, Maryland (2005), and London (2007). th th This 18 ISTTT celebrates the 50 Anniversary of this premier conference series.
Author: Xin Wang
Publisher: BoD – Books on Demand
ISBN: 9533074167
Category : Technology & Engineering
Languages : en
Pages : 528
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Book Description
Being infrastructure-less and without central administration control, wireless ad-hoc networking is playing a more and more important role in extending the coverage of traditional wireless infrastructure (cellular networks, wireless LAN, etc). This book includes state-of the-art techniques and solutions for wireless ad-hoc networks. It focuses on the following topics in ad-hoc networks: vehicular ad-hoc networks, security and caching, TCP in ad-hoc networks and emerging applications. It is targeted to provide network engineers and researchers with design guidelines for large scale wireless ad hoc networks.
Author: Carlos Daganzo
Publisher:
ISBN:
Category : Cellular automata
Languages : en
Pages : 28
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Book Description
This paper proves that the vehicle trajectories predicted by (i) a simple linear carfollowing model, CF(L), (ii) the kinematic wave model with a triangular fundamental diagram, KW(T), and (iii) two cellular automata models CA(L) and CA(M) match everywhere to within a tolerance comparable with a single "jam spacing". Thus, CF(L) = KW(T) = CA(L,M).
