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Railway Track Allocation
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Book Synopsis Railway Track Allocation by : Thomas Schlechte
Download or read book Railway Track Allocation written by Thomas Schlechte and published by Sudwestdeutscher Verlag Fur Hochschulschriften AG. This book was released on 2012-03 with total page 248 pages. Available in PDF, EPUB and Kindle. Book excerpt: This thesis is about mathematical optimization for the efficient use of railway infrastructure. We address the optimal allocation of the available railway track capacity - the track allocation problem. This track allocation problem is a major challenge for a railway company, independent of whether a free market, a private monopoly, or a public monopoly is given. Planning and operating railway transportation systems is extremely hard due to the combinatorial complexity of the underlying discrete optimization problems, the technical intricacies, and the immense sizes of the problem instances. Mathematical models and optimization techniques can result in huge gains for both railway customers and operators, e.g., in terms of cost reductions or service quality improvements. We tackle this challenge by developing novel mathematical models and associated innovative algorithmic solution methods for large scale instances. This allows us to produce for the first time reliable solutions for a real world instance, i.e., the Simplon corridor in Switzerland.
Author :Victoria Svedberg Publisher :Linköping University Electronic Press ISBN 13 :9176852350 Total Pages :158 pages Book Rating :4.1/5 (768 download)
Book Synopsis Towards optimal railway track utilization based on societal benefit by : Victoria Svedberg
Download or read book Towards optimal railway track utilization based on societal benefit written by Victoria Svedberg and published by Linköping University Electronic Press. This book was released on 2018-10-12 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: Infrastructure managers in railway systems are striving to have as e?cient track utilization as possible. There are no unanimous interpretation of e?ciency in terms of track utilization, but the aim of the Swedish Transport Administration is to allocate track capacity such that societal bene?t is maximized. This means that the tracks should be used by as much tra?c as possible and by tra?c that provides as much bene?t for the society as possible. To allocate track capacity such that the track utilization is optimal would be an easy task if the track capacity were not a scarce resource. Today, many train operators share railway network and there are cases when two or more operators want to use the same track capacity at the same time. The infrastructure manager must then make priorities and reject some operators, and the question is which operators to reject. The guiding principle is to grant the operators that provide the highest societal bene?t access to the tracks. However, the question would then change into how to know which operator that provides the highest societal bene?t. In this thesis, the societal bene?t of publicly subsidized tra?c is estimated using social cost-bene?t analysis. Mathematical models and methods are developed for quantifying and computing the number of departures for the publicly subsidized tra?c and their distribution in time, i.e. a train timetable, that provides the maximal societal bene?t in a social cost-bene?t analysis setting. The societal bene?t of commercial tra?c is estimated using the market value for their requested train timetables. The market value is set using dynamic pricing. A suggestion of a dynamic pricing process that can be used in the train timetabling process is described. Mathematical models and methods for calculating the supply and demand of a track access request are developed and tested, which enables the use of a dynamic pricing process on track capacity
Author :Abderrahman Ait Ali Publisher :Linköping University Electronic Press ISBN 13 :9179297714 Total Pages :51 pages Book Rating :4.1/5 (792 download)
Book Synopsis Methods for Capacity Allocation in Deregulated Railway Markets by : Abderrahman Ait Ali
Download or read book Methods for Capacity Allocation in Deregulated Railway Markets written by Abderrahman Ait Ali and published by Linköping University Electronic Press. This book was released on 2020-10-01 with total page 51 pages. Available in PDF, EPUB and Kindle. Book excerpt: Faced with increasing challenges, railways around Europe have recently undergone major reforms aiming to improve the efficiency and competitiveness of the railway sector. New market structures such as vertical separation, deregulation and open access can allow for reduced public expenditures, increased market competition, and more efficient railway systems. However, these structures have introduced new challenges for managing infrastructure and operations. Railway capacity allocation, previously internally performed within monopolistic national companies, are now conferred to an infrastructure manager. The manager is responsible for transparent and efficient allocation of available capacity to the different (often competing) licensed railway undertakings. This thesis aims at developing a number of methods that can help allocate capacity in a deregulated (vertically separated) railway market. It focuses on efficiency in terms of social welfare, and transparency in terms of clarity and fairness. The work is concerned with successive allocation of capacity for publicly controlled and commercial traffic within a segmented railway market. The contributions include cost benefit analysis methods that allow public transport authorities to assess the social welfare of their traffic, and create efficient schedules. The thesis also describes a market-based transparent capacity allocation where infrastructure managers price commercial train paths to solve capacity conflicts with publicly controlled traffic. Additionally, solution methods are developed to help estimate passenger demand, which is a necessary input both for resolving conflicts, and for creating efficient timetables. Future capacity allocation in deregulated markets may include solution methods from this thesis. However, further experimentations are still required to address concerns such as data, legislation and acceptability. Moreover, future works can include prototyping and pilot projects on the proposed solutions, and investigating legal and digitalisation strategies to facilitate the implementation of such solutions. Med ökande utmaningar har järnvägar runt om i Europa genomgått stora reformer som syftar till att förbättra järnvägssektorns effektivitet och konkurrenskraft. Nya marknadsstrukturer såsom vertikal separering, avreglering och öppet tillträde för flera operatörer kan möjliggöra minskade offentliga kostnader, ökad marknadskonkurrens och effektivare järnvägssystem. Denna omreglering av järnvägsmarknaderna har dock skapat nya utmaningar för hanteringen av järnvägsinfrastruktur och drift. Tilldelning av järnvägskapacitet, vilket tidigare sköttes inom nationella monopolföretag, måste nu göras av en infrastrukturförvaltare (infrastructure manager). Förvaltarens kapacitetstilldelning till olika (ofta konkurrerande) licensierade järnvägsföretag (railway undertakings) måste samtidigt vara transparent, rättvis och leda till ett effektivt kapacitetsutnyttjande. I denna avhandling utvecklas metoder som kan användas av en infrastrukturförvaltare för att tilldela kapacitet i en avreglerad järnvägsmarknad. Den fokuserar på samhällsekonomiskt effektiva utfall men även transparens, tydlighet och rättvisa. Avhandlingens bidrag omfattar samhällsekonomiska analysmetoder som gör det möjligt för regionala kollektivtrafikmyndigheter att bedöma den samhällsekonomiska effektiviteten för deras trafikering och skapa ett effektivt utbud. Med dessa metoder som utgångspunkt beskrivs en marknadsbaserad och transparent tilldelningsprocess för kapacitet där infrastrukturförvaltare prissätter kommersiella tåglägen för att lösa kapacitetskonflikter med offentligt kontrollerad trafik. Dessutom utvecklas optimeringsmetoder för att estimera passagerarefterfrågan och för att skapa effektiva tågtidtabeller. Framtida kapacitetstilldelning på avreglerade marknader kan inkludera lösningsmetoder från denna avhandling. Ytterligare experiment krävs dock fortfarande för att hantera problem såsom data, lagstiftning och godtagbarhet. Dessutom kan framtida arbete omfatta prototyper och pilotprojekt av de föreslagna lösningarna och undersöka lagliga och digitaliseringsstrategier för att underlätta implementeringen av sådana lösningar.
Book Synopsis Optimization of Schedules with Heterogeneous Train Structure in Plan-ning of Railway Lines by : Hyoung June Kim
Download or read book Optimization of Schedules with Heterogeneous Train Structure in Plan-ning of Railway Lines written by Hyoung June Kim and published by BoD – Books on Demand. This book was released on 2020-06-23 with total page 146 pages. Available in PDF, EPUB and Kindle. Book excerpt: One of the most important things to consider before constructing a railway is the train operating program. However, the analysis of the operating program based train schedule in the railway planning stage is carried out mainly on the basis of the intuitive experiences of the planner, and the optimization of the train schedule under various conditions is not properly considered. This study analyzes the optimization of heterogeneous train scheduling structures with minimizing the weighted scheduled waiting time and with the decision of Subsidiary Main Track (SMT) for overtaking of high-speed trains on the railway line. As a way for analyzing the Optimal Train Schedule (OTS) under constraint conditions, the genetic algorithm is used. The genetic algorithm is widely applied to various optimization and decision-making problems in engineering, natural sciences, business administration, and social sciences. The proposed method can examine train schedules for more scenarios, apply quantitative evaluation criteria, and review concrete infrastructures in comparison to the existing empirical method used in South Korea.
Book Synopsis Proceedings of the 1st International Workshop on High-Speed and Intercity Railways by : Yi-Qing Ni
Download or read book Proceedings of the 1st International Workshop on High-Speed and Intercity Railways written by Yi-Qing Ni and published by Springer Science & Business Media. This book was released on 2012-02-13 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book contains the papers included in the proceedings of the 1st International Workshop on High-speed and Intercity Railways (IWHIR 2011) held in Shenzhen and Hong Kong, China from July 19 to July 22, 2011, which is organized by The Hong Kong Polytechnic University, in collaboration with Southwest Jiaotong University, Beijing Jiaotong University, Dalian Jiaotong University, China Engineering Consultants, Inc., Zhejiang University, and Tsinghua University. Continuing the great initiatives and momentums of the rapid development in high-speed and intercity railways worldwide in recent years, IWHIR 2011 aims at providing a platform for academic scholars and practicing engineers to share knowledge and experience, to promote collaboration, and to strengthen R&D activities related to railway engineering. Engineers, scientists, professors, and students from universities, research institutes, and related industrial companies have been cordially invited to participate in the workshop. These papers have covered a wide range of issues concerning high-speed and intercity railways in the theoretical, numerical, and experimental work pertaining to high-speed and intercity railways. Showcasing diversity and quality, these papers report the state-of-the-art and point to future directions of research and development in this exciting area.
Book Synopsis Handbook of Optimization in the Railway Industry by : Ralf Borndörfer
Download or read book Handbook of Optimization in the Railway Industry written by Ralf Borndörfer and published by Springer. This book was released on 2018-03-01 with total page 321 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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
Book Synopsis Operations Research Proceedings 2007 by : Jörg Kalcsics
Download or read book Operations Research Proceedings 2007 written by Jörg Kalcsics and published by Springer Science & Business Media. This book was released on 2008-03-20 with total page 494 pages. Available in PDF, EPUB and Kindle. Book excerpt: The symposium Operations Research 2007 was held from September 5-7, 2007 at the Saarland University in Saarbru ̈cken. This international conference is at the same time the annual meeting of the German - erations Research Society (GOR). The transition in Germany (and many other countries in Europe) from a production orientation to a service society combined with a continuous demographic change generated a need for intensi?ed Op- ations Research activities in this area. On that account this conference has been devoted to the role of Operations Research in the service industry. The links to Operations Research are manifold and include many di?erent topics which are particularly emphasized in scienti?c sections of OR 2007. More than 420 participants from 30 countries made this event very international and successful. The program consisted of three p- nary,elevensemi-plenaryandmorethan300contributedpresentations, which had been organized in 18 sections. During the conference, the GOR Dissertation and Diploma Prizes were awarded. We congratulate all winners, especially Professor Wolfgang Domschke from the Da- stadt University of Technology, on receiving the GOR Scienti?c Prize Award.
Book Synopsis Statistics for Engineering and the Sciences by : William M. Mendenhall
Download or read book Statistics for Engineering and the Sciences written by William M. Mendenhall and published by CRC Press. This book was released on 2016-04-05 with total page 1183 pages. Available in PDF, EPUB and Kindle. Book excerpt: Prepare Your Students for Statistical Work in the Real WorldStatistics for Engineering and the Sciences, Sixth Edition is designed for a two-semester introductory course on statistics for students majoring in engineering or any of the physical sciences. This popular text continues to teach students the basic concepts of data description and statist
Author :Konstantinos Tzanakakis Publisher :Springer Science & Business Media ISBN 13 :3642360513 Total Pages :396 pages Book Rating :4.6/5 (423 download)
Book Synopsis The Railway Track and Its Long Term Behaviour by : Konstantinos Tzanakakis
Download or read book The Railway Track and Its Long Term Behaviour written by Konstantinos Tzanakakis and published by Springer Science & Business Media. This book was released on 2013-01-26 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt: A proper quality of a track and other infrastructure objects represents a basic requirement for train safety and punctuality. Most of the physical systems and their components deteriorate over time. This affects performance and may lead to failures. Albert Einstein said, “You have to learn the rules of the game. And then you have to play better than anyone else.” Only if we understand how the whole system works, taking into account its imperfections and how they influence its quality and performance will we be able to learn the rules of the game and “play better.” The book provides the readers with the necessary functional knowledge of track behaviour and comprehensively covers the function of the various track components, their interaction as elements of the track system, as well as the interaction of the track with railway vehicles. By presenting important tools for a deep understanding of track-behaviour this book aims to be a reference guide for infrastructure managers and to help them to find ways improving track quality for optimum long-term behaviour.
Book Synopsis Transport Economics by : Pbutton, Kenneth
Download or read book Transport Economics written by Pbutton, Kenneth and published by Edward Elgar Publishing. This book was released on 2022-05-28 with total page 592 pages. Available in PDF, EPUB and Kindle. Book excerpt: Transport Economics is a revised and refined fourth edition of a well-established textbook which applies economic analysis to transport issues. Each chapter has been carefully reworked and includes new material dealing with the regulation of transport markets. To assist in pedagogy, twenty or so free standing ‘Exhibits’ now provide a variety of case studies and narratives to supplement the text. More up-to-date examples and illustrations also make the understanding of economic principles easier and assist in the assimilation of economic concepts.
Author :Fahimeh Khoshniyat Publisher :Linköping University Electronic Press ISBN 13 :9176856313 Total Pages :49 pages Book Rating :4.1/5 (768 download)
Book Synopsis Optimization-Based Methods for Revising Train Timetables with Focus on Robustness by : Fahimeh Khoshniyat
Download or read book Optimization-Based Methods for Revising Train Timetables with Focus on Robustness written by Fahimeh Khoshniyat and published by Linköping University Electronic Press. This book was released on 2016-12-01 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Book Synopsis Network Economics by : Günter Knieps
Download or read book Network Economics written by Günter Knieps and published by Springer. This book was released on 2014-11-14 with total page 194 pages. Available in PDF, EPUB and Kindle. Book excerpt: This textbook on network economics provides essential microeconomic instruments for the analysis of network sectors like telecommunications, transport or energy. Network-specific characteristics emerge both on the cost side and benefit side, requiring network providers to develop innovative entrepreneurial competition strategies for costing, pricing, and investment. From a competition policy perspective, a number of interesting questions arise: In which parts of networks is competition functional? In contrast, where is an abuse of market power to be expected? What is the division of labor between cartel authorities and regulatory agencies? The book develops an analytical framework for all network industries which allows readers to study entrepreneurial strategies as well as regulation and competition policies for network industries.
Book Synopsis Operations Research Proceedings 2008 by : Bernhard Fleischmann
Download or read book Operations Research Proceedings 2008 written by Bernhard Fleischmann and published by Springer Science & Business Media. This book was released on 2009-08-04 with total page 586 pages. Available in PDF, EPUB and Kindle. Book excerpt: The international conference \Operations Research 2008", the annual meeting of the German Operations Research Society (GOR), was held at the University of Augsburg on September 3-5, 2008. About 580 p- ticipants from more than 30 countries presented and listened to nearly 400 talks on a broad range of Operations Research. The general subject \Operations Research and Global Business" str- ses the important role of Operations Research in improving decisions in the increasingly complex business processes in a global environment. The plenary speakers Morris A. Cohen (Wharton School) and Bernd Liepert (Executive Board of KUKA Robotics) addressed this subject. Moreover, one of the founders of Operations Research, Saul Gass (U- versity of Maryland), gave the opening speech on the early history of Operations Research. This volume contains 93 papers presented at the conference, selected by the program committee and the section chairs, forming a representative sample of the various subjects dealt with at Operations Research 2008. The volume follows the structure of the conference, with 12 sections, grouped into six \Fields of Applications" and six \Fields of Methods and Theory". This structure in no way means a separation of theory and application, which would be detrimental in Operations Research, but displays the large spectrum of aspects in the focus of the papers. Of course, most papers present theory, methods and applications together.
Book Synopsis Port Management by : H. Haralambides
Download or read book Port Management written by H. Haralambides and published by Springer. This book was released on 2015-07-21 with total page 367 pages. Available in PDF, EPUB and Kindle. Book excerpt: Port Management brings together a collection of seminal papers from Palgrave’s journal Maritime Economics and Logistics. It is a dynamic volume, containing contributions from leading authors with different disciplinary backgrounds, representing a vast regional diversity. The volume provides authoritative and timely investigations into key topics in port economics, including research on: global supply chains, port networks, choice modelling, port infrastructure, competition, port pricing, efficiency in European seaports, and an analysis of Chinese container ports. It is essential reading for professionals, scholars, and researchers interested in port economics.
Book Synopsis Lok Sabha Debates by : India. Parliament. Lok Sabha
Download or read book Lok Sabha Debates written by India. Parliament. Lok Sabha and published by . This book was released on 1989 with total page 1420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis SOFSEM 2015: Theory and Practice of Computer Science by : Giuseppe Italiano
Download or read book SOFSEM 2015: Theory and Practice of Computer Science written by Giuseppe Italiano and published by Springer. This book was released on 2015-01-14 with total page 631 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book constitutes the proceedings of the 41st International Conference on Current Trends in Theory and Practice of Computer Science held in Pec pod Sněžkou, Czech Republic, during January 24-29, 2015. The book features 8 invited talks and 42 regular papers which were carefully reviewed and selected from 101 submissions. The papers are organized in topical sections named: foundations of computer science; software and Web engineering; data, information, and knowledge engineering; and cryptography, security, and verification.
Book Synopsis Energy-Efficient Train Operation by : Shuai Su
Download or read book Energy-Efficient Train Operation written by Shuai Su and published by Springer Nature. This book was released on 2023-07-03 with total page 240 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is closely related to the energy conservation problem of rail transport systems, focusing on reducing the energy consumption of train operation. The system process of train operation is analyzed and the relationship between train operation and energy consumption is introduced. The fundamental theories, modelling and application of technologies for energy-efficient train driving are presented, discussing timely topics such as energy-efficient train control and timetabling, integrated timetabling and regenerative braking, and maximizing regenerated energy usage with energy storage systems. In addition, the modelling and application of a traction power simulation platform is introduced, to calculate the detailed energy flow over a railway network. The book is enriched with a set of practical examples to illustrate the performance of the proposed methods in improving energy efficiency of both urban and long-distance trains. Overall, the book provides a timely guide to professionals in the railway industry, and to researchers and graduate students in transport, electrical and control engineering.
