Evolution of railway network flexibility: The Spanish broad gauge case

作     者：Roanes-Lozano, Eugenio Laita, Luis M. Roanes-Macias, Eugenio Wester, Michael J. Luis Ruiz-Lozano, Jos Roncero, Carlos 

作者机构：Univ Complutense Madrid Dept Algebra E-28040 Madrid Spain Univ Politecn Madrid Dept Artificial Intelligence E-28660 Madrid Spain Univ New Mexico Dept Math & Stat Albuquerque NM 87131 USA Univ Seville Escuela Super Ingn Ind E-41092 Seville Spain Univ Extremadura Esc Ingn Ind Dept Ingn Elect & Elect E-06071 Badajoz Spain 

出 版 物：《MATHEMATICS AND COMPUTERS IN SIMULATION》 (系统模拟中的数学与计算机)

年 卷 期：2009年第79卷第8期

页      面：2317-2332页

核心收录：

学科分类：07[理学] 070104[理学-应用数学] 0835[工学-软件工程] 0701[理学-数学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Ministerio de Educación y Ciencia, Spain, (UCM2006-910563) Universidad Complutense de Madrid, UCM 

主　　题：Railway network analysis Graph theory Computer algebra systems 

摘      要：The length of the Spanish broad gauge network has decreased in the 1956-2006 period. When looking at different railway maps through this period, it seems that the network is offering fewer and fewer alternatives when a line is cut, that is, the network is becoming less and less flexible. The goal of this article is to prove that the flexibility of the Spanish broad gauge network has decreased substantially in the 1956-2006 period. We have considered the network as a graph (ignoring traditional railway quality indicators such as commercial speed, number of tracks, electrifications, signaling, ...) and we have chosen two simple indicators as accurate in this sense: the number of cycles (cycles provide an alternative to reach a station if there is a problem in one line) and the number of stations of intermediate degree. To achieve this, we have developed a piece of software that is an ad hoc extension of Maple s networks package. (C) 2008 IMACS. Published by Elsevier B.V. All rights reserved.