A Simulation-Optimization Approach for Improved Robustness of Railway Timetables

A Simulation-Optimization Approach for Improved Robustness of Railway Timetables
Title A Simulation-Optimization Approach for Improved Robustness of Railway Timetables PDF eBook
Author Johan Högdahl
Publisher
Pages
Release 2019
Genre
ISBN 9789178733644

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Improving Timetable Robustness and Punctuality of Railway Traffic

Improving Timetable Robustness and Punctuality of Railway Traffic
Title Improving Timetable Robustness and Punctuality of Railway Traffic PDF eBook
Author Johan Högdahl
Publisher
Pages 0
Release 2022
Genre
ISBN 9789180403726

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Optimization-Based Methods for Revising Train Timetables with Focus on Robustness

Optimization-Based Methods for Revising Train Timetables with Focus on Robustness
Title Optimization-Based Methods for Revising Train Timetables with Focus on Robustness PDF eBook
Author Fahimeh Khoshniyat
Publisher Linköping University Electronic Press
Pages 60
Release 2016-12-01
Genre
ISBN 9176856313

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With increase in the use of railway transport, ensuring robustness in railway timetables has never been this important. In a dense railway timetable even a small disturbance can propagate easily and affect trains' arrival and departure times. In a robust timetable small delays are absorbed and knock-on effects are prevented effectively. The aim of this thesis is to study how optimization tools can support the generation of robust railway traffic timetables. We address two Train Timetabling Problems (TTP) and for both problems we apply Mixed Integer Linear Programming (MILP) to solve them from network management perspectives. The first problem is how robustness in a given timetable can be assessed and ensured. To tackle this problem, a headway-based method is introduced. The proposed method is implemented in real timetables and evaluated from performance perspectives. Furthermore, the impact of the proposed method on capacity utilization, heterogeneity and the speed of trains, is monitored. Results show that the proposed method can improve robustness without imposing major changes in timetables. The second problem addressed in the thesis is how robustness can be assessed and maintained in a given timetable when allocating additional traffic and maintenance slots. Different insertion strategies are studied and their consequences on capacity utilization and on the properties of the timetables are analyzed. Two different insertion strategies are considered: i) simultaneous and ii) stepwise insertion. The results show that inserting the additional trains simultaneously usually results in generating more optimal solutions. However, solving this type of problem is computationally challenging. We also observed that the existing robustness metrics cannot capture the essential properties of having more robust timetables. Therefore we proposed measuring Channel Width, Channel Width Forward, Channel Width Behind and Track Switching. Furthermore, the experimental analysis of the applied MILP model shows that some cases are computationally hard to solve and there is a need to decrease the computation time. Hence several valid inequalities are developed and their effects on the computation time are analyzed. This thesis contains three papers which are appended. The results of this thesis are of special interests for railway traffic planners and it would support their working process. However, railway traffic operators and passengers also benefit from this study.

Computers in Railways XIII

Computers in Railways XIII
Title Computers in Railways XIII PDF eBook
Author C. A. Brebbia
Publisher WIT Press
Pages 781
Release 2013
Genre Transportation
ISBN 1845646169

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Containing the proceedings of the Thirteenth International Conference on Design and Operation in Railway Engineering, this book presents the latest developments in the use of computer-based techniques in the design and operation of railways. The COMPRAIL conference series serves as the forum for major advances in this important field. The book covers such topics as Advanced Train Control; Planning; Timetable Planning; Rescheduling; Risk Management; Safety and Security; Maglev and High-speed Railways; Traffic Control and Safety of High-speed Railways; Metro and Other Transit Systems; Communications and Signalling; Energy Supply and Consumption; Driverless and Automatic Train Operation; Operations Quality; Computer Techniques and Simulations; Railway Vehicle Dynamics; Dynamics and Wheel/Rail Interface; Monitoring and Maintenance; Crack, Damage and Fatigue Problems.The book will be of interest to railway managers, consultants, railway engineers (including signal and control engineers), designers of advanced train control systems and computer specialists

Intelligent Transportation and Planning: Breakthroughs in Research and Practice

Intelligent Transportation and Planning: Breakthroughs in Research and Practice
Title Intelligent Transportation and Planning: Breakthroughs in Research and Practice PDF eBook
Author Management Association, Information Resources
Publisher IGI Global
Pages 1134
Release 2018-02-02
Genre Transportation
ISBN 1522552111

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From driverless cars to vehicular networks, recent technological advances are being employed to increase road safety and improve driver satisfaction. As with any newly developed technology, researchers must take care to address all concerns, limitations, and dangers before widespread public adoption. Intelligent Transportation and Planning: Breakthroughs in Research and Practice is an innovative reference source for the latest academic material on the applications, management, and planning of intelligent transportation systems. Highlighting a range of topics, such as automatic control, infrastructure systems, and system architecture, this publication is ideally designed for engineers, academics, professionals, and practitioners actively involved in the transportation planning sector.

Handbook of Optimization in the Railway Industry

Handbook of Optimization in the Railway Industry
Title Handbook of Optimization in the Railway Industry PDF eBook
Author Ralf Borndörfer
Publisher Springer
Pages 334
Release 2018-03-01
Genre Business & Economics
ISBN 3319721534

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This book promotes the use of mathematical optimization and operations research methods in rail transportation. The editors assembled thirteen contributions from leading scholars to present a unified voice, standardize terminology, and assess the state-of-the-art. There are three main clusters of articles, corresponding to the classical stages of the planning process: strategic, tactical, and operational. These three clusters are further subdivided into five parts which correspond to the main phases of the railway network planning process: network assessment, capacity planning, timetabling, resource planning, and operational planning. Individual chapters cover: Simulation Capacity Assessment Network Design Train Routing Robust Timetabling Event Scheduling Track Allocation Blocking Shunting Rolling Stock Crew Scheduling Dispatching Delay Propagation

Robust and Online Large-Scale Optimization

Robust and Online Large-Scale Optimization
Title Robust and Online Large-Scale Optimization PDF eBook
Author Ravindra K. Ahuja
Publisher Springer Science & Business Media
Pages 439
Release 2009-10-26
Genre Computers
ISBN 3642054641

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Scheduled transportation networks give rise to very complex and large-scale networkoptimization problems requiring innovative solution techniques and ideas from mathematical optimization and theoretical computer science. Examples of scheduled transportation include bus, ferry, airline, and railway networks, with the latter being a prime application domain that provides a fair amount of the most complex and largest instances of such optimization problems. Scheduled transport optimization deals with planning and scheduling problems over several time horizons, and substantial progress has been made for strategic planning and scheduling problems in all transportation domains. This state-of-the-art survey presents the outcome of an open call for contributions asking for either research papers or state-of-the-art survey articles. We received 24 submissions that underwent two rounds of the standard peer-review process, out of which 18 were finally accepted for publication. The volume is organized in four parts: Robustness and Recoverability, Robust Timetabling and Route Planning, Robust Planning Under Scarce Resources, and Online Planning: Delay and Disruption Management.