Robust Design And Evaluation Of Transportation Networks With Equilibrium Under Demand Uncertainty
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Robust Design And Evaluation Of Transportation Networks With Equilibrium Under Demand Uncertainty
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Author : Jennifer Clare Duthie
language : en
Publisher:
Release Date : 2006
Robust Design And Evaluation Of Transportation Networks With Equilibrium Under Demand Uncertainty written by Jennifer Clare Duthie and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2006 with Origin and destination traffic surveys categories.
Robust Transportation Network Design Under User Equilibrium
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Author : Yun Lu
language : en
Publisher:
Release Date : 2007
Robust Transportation Network Design Under User Equilibrium written by Yun Lu and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2007 with categories.
We address the problem of designing a transportation network in the presence of demand uncertainty, multiple origin-destination pairs and a budget constraint for the overall construction cost, under the behavioral assumption that travelers optimize their own travel costs (i.e., the "user-equilibrium" condition). Under deterministic demand, we propose an exact integer optimization approach that leads to a quadratic objective, linear constraints optimization problem. As a result, the problem is efficiently solvable via commercial software, when the costs are linear functions of traffic flows. We then use an iterative algorithm to address the case of nonlinear cost functions. While the problem is intractable under probabilistic assumptions on demand uncertainty, we extend the previous model and propose an iterative algorithm using a robust optimization approach that models demand uncertainty. We finally report extensive numerical results to illustrate that our approach leads to tractable solutions for large scale networks.
Network Reliability In Practice
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Author : David Levinson
language : en
Publisher: Springer Science & Business Media
Release Date : 2011-10-26
Network Reliability In Practice written by David Levinson 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 2011-10-26 with Political Science categories.
This book contains selected peer-reviewed papers that were presented at the Fourth International Symposium on Transportation Network Reliability (INSTR) Conference held at the University of Minnesota July 22-23, 2010. International scholars, from a variety of disciplines--engineering, economics, geography, planning and transportation—offer varying perspectives on modeling and analysis of the reliability of transportation networks in order to illustrate both vulnerability to day-to-day and unpredictability variability and risk in travel, and demonstrates strategies for addressing those issues. The scope of the chapters includes all aspects of analysis and design to improve network reliability, specifically user perception of unreliability of public transport, public policy and reliability of travel times, the valuation and economics of reliability, network reliability modeling and estimation, travel behavior and vehicle routing under uncertainty, and risk evaluation and management for transportation networks. The book combines new methodologies and state of the art practice to model and address questions of network unreliability, making it of interest to both academics in transportation and engineering as well as policy-makers and practitioners.
The Robust Network Design Problem A Game Theory Approach To Account For Capacity Uncertainty
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Author : Nikolaos Deligiannis
language : en
Publisher:
Release Date : 2015
The Robust Network Design Problem A Game Theory Approach To Account For Capacity Uncertainty written by Nikolaos Deligiannis and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2015 with categories.
National as well as state economies are contingent on their transport network reliability. Traffic demand levels are constantly on the rise and there is an urging request, by network users, for free flow travel, even if parts of the road network are congested or disrupted. To assist the evaluation, design and monitoring of road networks, existing network reliability analysis methods and techniques, should be further developed, not only from the theoretical stand point, but also for practical application. This study has examined literature on network reliability evaluation methods, approaches and metrics in order to provide a brief listing of the most cited work. In this effort, sources of other disciplines (besides Transportation Engineering) have been reviewed in an effort to explore and propose possible methods and techniques that have not been implemented in road network reliability to date. The study also proposes a game theoretical modeling approach to account for capacity uncertainty, and help decision makers to choose the optimal investment plan over all possible scenarios.
Transportation Research Record
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Author :
language : en
Publisher:
Release Date : 1974
Transportation Research Record written by and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1974 with Roads categories.
Optimization Models And Methods For Equilibrium Traffic Assignment
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Author : Alexander Krylatov
language : en
Publisher: Springer Nature
Release Date : 2019-11-26
Optimization Models And Methods For Equilibrium Traffic Assignment written by Alexander Krylatov and has been published by Springer Nature this book supported file pdf, txt, epub, kindle and other format this book has been release on 2019-11-26 with Technology & Engineering categories.
This book is focused on the discussion of the traffic assignment problem, the mathematical and practical meaning of variables, functions and basic principles. This work gives information about new approaches, methods and algorithms based on original methodological technique, developed by authors in their publications for the past several years, as well as corresponding prospective implementations. The book may be of interest to a wide range of readers, such as civil engineering students, traffic engineers, developers of traffic assignment algorithms etc. The obtained results here are to be used in both practice and theory. This book is devoted to the traffic assignment problem, formulated in a form of nonlinear optimization program. The most efficient solution algorithms related to the problem are based on its structural features and practical meaning rather than on standard nonlinear optimization techniques or approaches. The authors have carefully considered the meaning of the traffic assignment problem for efficient algorithms development.
Robust Pricing Of Transportation Networks Under Uncertainty
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Author : Stephen David Boyles
language : en
Publisher:
Release Date : 2010
Robust Pricing Of Transportation Networks Under Uncertainty written by Stephen David Boyles and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2010 with Congestion pricing categories.
Solution Methods For Robust Pricing For Transportation Networks Under Demand Uncertainty
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Author : Lauren Marie Gardner
language : en
Publisher:
Release Date : 2008
Solution Methods For Robust Pricing For Transportation Networks Under Demand Uncertainty written by Lauren Marie Gardner and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with categories.
Equilibrium Models Accounting For Uncertainty And Information Provision In Transportation Networks
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Author : Avinash Unnikrishnan
language : en
Publisher:
Release Date : 2008
Equilibrium Models Accounting For Uncertainty And Information Provision In Transportation Networks written by Avinash Unnikrishnan and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 2008 with Origin and destination traffic surveys categories.
Researchers in multiple areas have shown that characterizing and accounting for the uncertainty inherent in decision support models is critical for developing more efficient planning and operational strategies. This is particularly applicable for the transportation engineering domain as most strategic decisions involve a significant investment of money and resources across multiple stakeholders and has a considerable impact on the society. Moreover, most inputs to transportation models such as travel demand depend on a number of social, economic and political factors and cannot be predicted with certainty. Therefore, in recent times there has been an increasing emphasis being placed on identifying and quantifying this uncertainty and developing models which account for the same. This dissertation contributes to the growing body of literature in tackling uncertainty in transportation models by developing methodologies which address the uncertainty in input parameters in traffic assignment models. One of the primary sources of uncertainty in traffic assignment models is uncertainty in origin destination demand. This uncertainty can be classified into long term and short term demand uncertainty. Accounting for long term demand uncertainty is vital when traffic assignment models are used to make planning decisions like where to add capacity. This dissertation quantifies the impact of long term demand uncertainty by assigning multi-variate probability distributions to the demand. In order to arrive at accurate estimates of the expected future system performance, several statistical sampling techniques are then compared through extensive numerical testing to determine the most "efficient" sampling techniques for network assignment models. Two applications of assignment models, network design and network pricing are studied to illustrate the importance of considering long term demand uncertainty in transportation networks. Short term demand uncertainty such as the day-to-day variation in demand affect traffic assignment models when used to make operational decisions like tolling. This dissertation presents a novel new definition of equilibrium when the short term demand is assumed to follow a probability distribution. Various properties of the equilibrium such as existence, uniqueness and presence of a mathematical programming formulation are investigated. Apart from demand uncertainty, operating capacity in real world networks can also vary from day to day depending on various factors like weather conditions and incidents. With increasing deployment of Intelligent Transportation Systems, users get information about the impact of capacity or the state of the roads through various dissemination devices like dynamic message signs. This dissertation presents a new equilibrium formulation termed user equilibrium with recourse to model information provision and capacity uncertainty, where users learn the state or capacity of the link when they arrive at the upstream node of that link. Depending on the information received about the state of the upstream links, users make different route choice decisions. In this work, the capacity of the links in the network is assumed to follow a discrete probability distribution. A mathematical programming formulation of the user equilibrium with recourse model is presented along with solution algorithm. This model can be extended to analytically model network flows under information provision where the arcs have different cost functional form depending on the state of the arc. The corresponding system optimal with recourse model is also presented where the objective is minimize the total system cost. The network design problem where users are routed according to the user equilibrium with recourse principle is studied. The focus of this study is to show that planning decisions for networks users have access to information is significantly different from the no-information scenario.
The Network Reliability Of Transport
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Author : M. G. H. Bell
language : en
Publisher: Elsevier
Release Date : 2003-05-08
The Network Reliability Of Transport written by M. G. H. Bell and has been published by Elsevier this book supported file pdf, txt, epub, kindle and other format this book has been release on 2003-05-08 with Political Science categories.
The reliability of transportation networks has become an increasingly important issue as sustained economic growth and improvements to the quality of life around the world lead to increases in the value of time. Consequently, schedules and routes need to be able to accommodate the unexpected, like accidents, disasters or traffic flow fluctuations, with as little loss in operational efficiency as possible. Sources of unreliability include variation of demand and supply. It is widely expected that network reliability analysis will play a more important role in the planning, design and management of transportation facilities and networks in the future. This book is an outcome of the First International Symposium on Transport Network Reliability (INSTR), held at Kyoto in 2001, and consists of 24 selected papers. It covers various aspects of transport network reliability, such as definitions and methodological developments for reliability indices, behavioural analysis under uncertainty, evaluation methods for the disaster resistance of transport networks, and simulation/observation of travel time reliability.