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Alberto García-Álvarez

Alberto García-Álvarez

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18
Publications
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145
Citations
Citations since 2017
1 Research Item
98 Citations
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Publications

Publications (18)
Article
In this paper, we propose a method for finding the optimal route for a specific train from a station to another one in the Spanish railway network (or any railway network involving different incompatible features like gauges, electrification and signaling systems). The complexity of the Spanish railway infrastructure makes it difficult to give an e...
Article
Transport infrastructures, including high-speed rail networks, are built to make efficient transport services possible. An analysis of the characteristics of the networks and sections they comprise can support design decisions and contribute to increase the efficiency of transport services. This paper is devoted to analysis of the structure and top...
Article
Transport infrastructures, including high-speed rail networks, are built to make efficient transport services possible. An analysis of the characteristics of the networks and sections they comprise can support design decisions and contribute to increase the efficiency of transport services. This paper is devoted to analysis of the structure and top...
Article
Full-text available
Planning the operations of Renfe Operadora trains on Adif's (Spanish) railway network is very complex. The reasons are the coexistence of two track gauges, two kinds of electrification systems and five types of signaling systems; together with fixed and variable gauge rolling stock, sometimes able to run under different types of electrification and...
Article
Full-text available
The Spanish railway network is very complex, with two different track gauges: the broad classic Iberian track gauge and the so called international gauge, the latter used in the extensive high speed network. All new lines have been built with double track and top technologies. But there are controversial opinions among experts regarding how the net...
Article
Full-text available
Discusses the advancements made in electric rail transportation and reports on the advantages in offers for the future of mass transportation.
Article
The Spanish railway network has two different track gauges, two electrification systems, and four families of signaling systems--and the rolling stock includes hybrid trains. The new, extended package presented here finds the timings and best route for any piece of rolling stock and computes its consumption, emissions, and exploitation costs.
Article
Full-text available
Increasing the speed at which a train can run on downward slopes through the effect of the force of gravity and the inertia of the train could involve: a reduction in travel time whilst also reducing energy consumed (due to reduced use of the brake). This increase in speed on downward slopes also offers the possibility of reducing the power of trai...
Article
The Spanish railway network managed by the Adif company has two different track gauges, two electrification systems, and four families of signaling systems. The simulation package presented here takes these variations into account, making it easier to decide about routes, rolling-stock selection, and future infrastructure or vehicle investments.
Article
Full-text available
This paper provides a new methodology for estimating fuel consumption and emissions by enabling a correct comparison between freight transportation modes. The approach is developed and integrated as a part of an intelligent transportation system dealing with goods movement. A key issue is related to energy consumption ratios and consequent CO2 emis...
Article
Full-text available
We present here what, as far as we know, is a real novelty: a computer package that can automatically generate railway maps of a certain network at any (past) date requested, using different colors to show the type of line. The input is: (1) a set of historical events, (2) the graph of the railway network at its maximum extension and (3) a list of...
Article
A geometric approach to radial railway network improvement is presented here. It uses what we have called ‘isochrone circle graphs’, a kind of diagrams that reflect the values of two variables, mixing ideas from isochrone maps and from polar area diagrams (unlike the former, the areas of the sectors are related to population, not to ‘geographical a...
Article
This paper analyzes the relationships between the speed of passenger trains (especially high-speed trains), their energy consumption, and their greenhouse gas emissions. After an outline of the special energy consumption characteristics of high-speed railway systems, the amounts of energy consumed by conventional and high-speed passenger railway sy...
Article
The goal of this project (endorsed by the Spanish Railway Foundation) is to develop a detailed and flexible accelerated-time microscopic simulation of train movements within a specialized double-track freight line. The virtual line is provided with a fixed section rail traffic controller (like a classic semaphore-based block-system or Level 1 ERTMS...
Article
Full-text available
En este artículo se describen y analizan los nuevos sistemas desarrollados, probados e implantados en España para solucionar el problema de la diferencia de ancho de vía entre el ancho ibérico y el ancho internacional, que es el empleado en las nuevas líneas de alta velocidad. Los trenes capaces de cambiar el ancho de vía, las instalaciones fijas a...
Article
Full-text available
El viaje de una persona de Barcelona a Madrid en avión produce unas emisiones de CO2 equivalentes, aproximadamente, al peso de la persona que viaja (70 kg); si ese viajero opta por emplear el tren de alta velocidad en el mismo recorrido, las emisiones serán aproximadamente iguales al peso de su equipaje (13 kg). En este artículo se muestra que, en...
Article
Full-text available
Resumen En una parte significativa de la red básica ferroviaria española y en los Metros de Madrid y de Bilbao, los trenes circulan normalmente por la izquierda en las líneas de vía doble (como también ocurre en Francia, en Gran Bretaña y muchos otros países). En la mayor parte de la red española y en Alemania, lo hacen por la derecha. En este trab...
Article
Tesis doctoral inédita. Universidad Autónoma de Madrid, Facultad de Ciencias Económicas y Empresariales, Departamento de Contabilidad y Administración de Empresas. Fecha de lectura: 10-06-04 Bibliogr.: p.501-512

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