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número 3. octubre 2015 Reseñas de Libros, Artículos y Publicaciones
and determines the degree of connection of the region on a national scale with Spain and an
international scale with Portugal.
This paper is based on the use of tools for network design and the geographic information
systems (GIS) and proposes a new indicator of absolute accessibility parameters application,
together with the exploitation of information use of the descriptive statistics.
The obtained results show how the isolated areas, without adequate access to high-speed
service, are going to continue to exist although it diminishes the lack of equity in the
different zones of Extremadura, which is the object of study.
Keywords: High-speed rail; Accessibility; Geographical information systems; Regional
dissymmetry; Tunnel effect
Zhang, J. Analysis on line capacity usage for China high speed railway with
optimization approach, Transportation Research Part A: Policy and Practice,
Volume 77, July 2015, Pages 336-349, ISSN 0965-8564,
http://dx.doi.org/10.1016/j.tra.2015.04.022.
(http://www.sciencedirect.com/science/article/pii/S0965856415001081)
Abstract: The purpose for the analysis of capacity usage is to utilize the rail infrastructure
in a more efficient and practical way. The practical and theoretical challenge of the rail
capacity is its dynamics and uncertainty, which are common in China and elsewhere. Based
on the capacity balance, a train service-demand intention set (TSDIS) at High-Speed Rail
(HSR) line (t@l-TSDIS) is defined, which takes the number of trains, the average speed, the
heterogeneity and the stability as the core elements for the capacity usage. For dynamics
and uncertainty, we update the norm for capacity measure as the time needed to fulfill the
task list t@l-TSDIS. Then we develop the objectives and constraints for the Mathematical
Program for Line Capacity (MPLC), which aims at minimization of heterogeneity and running
time as well as maximization of reliability. For solving MPLC, the Pareto Archived
Evolutionary Strategy (PAES) and fuzzy logic penalty function are introduced. Furthermore
we propose a rolling optimization tactic oriented by the practical problem, which combines
the improved Pareto Archived Evolutionary Strategy (iPAES) with an interactive technique.
In a case study, we apply the proposed ideas and methodology to Beijing-Shanghai HSR (BS-
HSR) line much closer to the railway practice. By using the computer language C# to compile
the Console program, Pareto optimized results for MPLC are achieved, including the
standard and practical values for the heterogeneity indices, reliability indices and running
time indices. We also discuss the sensitivity of the heterogeneity index. This research
demonstrates that it is useful to analyze the line capacity usage for China HSR with the
proposed optimization approach.
Keywords: Rail capacity usage; China high speed rail (HSR); Mathematical Program for Line
Capacity (MPLC); Improved Pareto Archived Evolutionary Strategy (iPAES); Interactive
method; Rolling optimization strategy
Nash, C. When to invest in high speed rail, Journal of Rail Transport Planning &
Management, Volume 5, Issue 1, May 2015, Pages 12-22, ISSN 2210-9706,
http://dx.doi.org/10.1016/j.jrtpm.2015.02.001.
(http://www.sciencedirect.com/science/article/pii/S2210970615000037)
Abstract: This paper starts by a general review of the costs and benefits of high speed rail,
of how they are measured in cost–benefit analysis and of the circumstances in which
benefits may be expected to exceed costs. Two approaches are taken to the latter; first,
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