Abstract

[EN] The Andalusian sector of regular public passenger transport of general use, has beentraditionally characterized by being configured by a wide variety of operators of small andmedium-scale, where the concession contracts were the only and main economic activity.Over time, new trends have appeared on the market that have led to the evolution of thesector to other models. On the one hand, transformation of the business owner tocorporations, and secondly the penetration of large multinational companies which haveentered the sector through the acquisition and, on many occasions, absorbing existingconcession companies.This paper analyzes the changes experienced in the concession contracts related to theirchange of ownership and its impact on the current structure industry. The analysis showsan overview of the regular public transport system travelers utility road in Andalusia.The results are interesting for the planning and design of new concession contracts,extension approach of the current contracts and general optimization of the system forpromotion of a sustainable transport, which satisfies needs of users, respecting the rule offree market.In short, this paper aims to provide a deeper knowledge of the sector, from the point ofview of the operating companies that intergrates it, showing the evolution in existingbusiness structures. Sanchez Portales, S.; Maeso Gonzalez, E. (2016). PUBLIC BUS SERVICE AND THE CONCESSION CONTRACT IN ANDALUSIA. EFFECT OF TRANSMISSION. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 329-336. https://doi.org/10.4995/CIT2016.2016.3975 OCS 329 336

Abstract

[EN] Nowadays one of the main priorities for metro line operators is the reduction of energy consumption, due to the environmental impact and economic cost. In order to achieve this objective different strategies can be applied, normally focused into rolling stock, infrastructure and/or operation. Considering short-term measures and related to the traffic operation strategies, different approaches are being researched. One of the most effective strategy which reduce net energy consumption is the use of efficient driving techniques. These techniques produces a speed profile between two stations that requires the minimum net energy consumption, without degrading commercial running times or passenger comfort. In this paper, a computer model for calculating the metro vehicles speed profiles minimizing the energy consumption was developed. The equations considered in the model represent the behavior of a single vehicle operated under manual driving, subject to different constraints such as the headway, cycle time, distances and acceleration limits. The proposed model calculates different commands to be systematically executed by the driver. The resulting simulator has been tuned by means of on board measurements of speed, accelerations and energy consumption obtained along different lines in Metro de Valencia network. For this purpose, different scenarios are analyzed to assess the achievable energy savings. In general terms and comparing with the actual energy consumption, the solutions proposed can reduce the net energy consumption around 19% The authors wish to thank Ferrocarrils de la Generalitat Valenciana (FGV) for their kind support during the development of this study, including their assistance during the installation of the consumption devices aboard their trains and their permission to carry out measurements during the normal service. This project has by funded by the Spanish Ministry of Economy and Competitiveness (Ref. TRA2011-26602). Villalba Sanchis, I.; Salvador Zuriaga, P. (2016). An energy-efficient metro speed profiles for energy savings: application to the Valencia metro. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 1820-1832. https://doi.org/10.4995/CIT2016.2016.3774 OCS 1820 1832

Abstract

[EN] Assessing the environmental impact of transport has been an issue over the last decade. The general framework is established and the followings factors must be considered to obtain results as accurate as possible. Among others (a) the study should considered the entire life cycle if possible: building & materials, usage phase and waste treatment and (b) usage phase assessment must be developed under real conditions in addition to lab tests. When the object of study is urban private transport, some extra lines can be taken into account considering the high impact that environmental initiatives makes in society. The information that local authorities and community receives about the initiative is as relevant as the environmental benefits obtain of the implementation of the project. In this paper, we present the methodology developed to assess CO2 emissions of electric vehicles intendent to car-sharing and home care; two projects developed at Valencian region. We deepen in the relevance and type of information obtain and manage for both studies with a life cycle vision. As a result of usage phase assessment, field test proves to be revealing giving a more realistic vision of the benefits of the project. Theoretical assessments were useful to consider the implementation of a certain project and the necessary support complementing the entity of the study. Resources needed to develop field test might skew results by biasing the study. Attention need to be paid in order to manage resources to set up field tests and avoid setting up field tests due to available resources. Bibliographic studies have shown building, materials and waste treatment depends on available data. Life cycle assessment seems to be the most adequate tool to obtain accurate results although the cost of the assessment is high and might not show significant differences between cars of similar characteristics. Authors would like to thank MOVUS S.L, Juan Sans Hospital of Alcoy, Sagunto Town Council and Univeristat Politècnica de València for their participation and trust in this project. Lo Iacono Ferreira, V.; Torregrosa López, J.; Colomer Ferrandiz, JV. (2016). Assessing CO2 emissions of electric vehicles for e-sharing and home care. Two cases developed at Valencian region. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 1939-1946. https://doi.org/10.4995/CIT2016.2016.3430 OCS 1939 1946

Abstract

[ES] En julio de 2013 comenzó el proyecto DOROTHY “Development Of RegiOnal clusTers for researcH and implementation environmental friendlY urban logistics" (www.clusterdorothy.com), que forma parte del 7th Framework Programme of the EU. Dicho proyecto está centrado en la logística urbana. Su fecha de finalización, 30 de Junio de 2016, coincide prácticamente con la celebración del Congreso de Ingeniería de Transporte CIT 2016. Uno de los objetivos principales del Proyecto Dorothy es la creación de clusters, a nivel regional que aborden temas relacionados con la logística urbana. Uno de estos clústers se ha desarrollado en la Región de Valencia. La creación de un clúster en logística urbana, y su puesta en marcha, sin disponer de fondos económicos para su dinamización inicial, es un proceso complejo que requiere abordar diversos pasos con continuidad y llevar a cabo distintas gestiones. Al menos este ha sido el caso de la creación del clúster de la Región de Valencia. Entendemos que explicar este proceso con cierto detalle puede resultar de interés para futuras creaciones de asociaciones o clústers relacionados con la logística urbana o con el transporte en sus diversos aspectos. La presente ponencia recoge las distintas acciones que han sido necesarias para la creación del clúster, así como las primeras actuaciones del mismo que ponen de manifiesto el dinamismo inicial de esta iniciativa. Colomer Font, O.; Colomer Ferrandiz, JV.; Fiore, M. (2016). Proyecto Dorothy: creación y puesta en marcha del "Clúster Logística Urbana de la Comunitat Valenciana. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 801-819. https://doi.org/10.4995/CIT2016.2016.4265 OCS 801 819

Abstract

[EN] Urban transport is a comprehensive and dynamic mechanism. Therefore, all the problems for improving and reorganization of the system can be examined only in the light of a systemic approach. Currently, public passenger transport is one of the most important branches of the urban development in cities and metropolis. Public passenger transport activity and all the steps taken to improve that activity are considered to be of great social importance. In the current stage of city development, one of the main tasks is to create a public passenger transportation system that is safe, affordable, economical, reliable and environmentally friendly. The important role of passenger transport in the city's economy and achieving important social services to the population, dictates the need to introduce measures in the system that are harmonious, balanced and effective. This can only be done, in the context of current development, only after the system as a whole is tested extensively through special traffic and management software. Dumitru, I.; Matei, L.; Racila, L.; Nicolae, D. (2016). Public transport traffic management systems simulation in Craiova city. En XII Congreso de ingeniería del transporte. 7, 8 y 9 de Junio, Valencia (España). Editorial Universitat Politècnica de València. 826-831. https://doi.org/10.4995/CIT2016.2016.4255 OCS 826 831