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Browsing by UPV Unit "Universitat Politècnica de València. Departamento de Ingeniería e Infraestructura de los Transportes - Departament d'Enginyeria i Infraestructura dels Transports"

Now showing items 1-20 of 221

'Cielos abiertos', el status quo predominante en el mercado actual de transporte aéreo

Mateu Céspedes, José María (2015-04-16)

Describe los Acuerdos más habituales actualmente en el ámbito del Transporte Aéreo Internacional. Explica las circunstancias que obligaron a la Unión Europea a avanzar hacia este tipo de acuerdos en la primera década del ...
A New Traffic-Calming Device: Speed Kidney

García García, Alfredo; Moreno Chou, Ana Tsui; Romero Rojas, Mario Alfonso (Institute of Transportation Engineers, 2012-12)

[EN] The speed kidney is a new traffic-calming device that consists of a raised and curved area placed at the center of any lane. Drivers can choose to adopt a curved path, moderating speeds but avoiding disadvantages of ...
A procedure for the evaluation of vibrations induced by the passing of a train and its application to real railway traffic

Salvador Zuriaga, Pablo; Real Herráiz, Julia Irene; Zamorano, Clara; Villanueva, Antonio (Elsevier, 2011-01)

In recent years, ground vibrations have become an important issue due to the growing awareness of the society about environmental living conditions. In this way, vibrations caused by trains running near houses or workplaces ...
A QUALITATIVE STUDY ON THE ROLE OF THE BUILT ENVIRONMENT FOR SHORT WALKING TRIPS

Ferrer López, Sheila; Ruiz Sánchez, Tomás; Mars, L. (ELSEVIER SCI LTD, 2015-08)

The present study uses a qualitative approach with the aim to identify built environmental factors influencing short walking distances for transportation among adults (18-65 years), with special attention to micro-scale ...
Alternativas para el transporte aéreo de mercancías.

Mateu Céspedes, José María (2018-03-13)

Este objeto de aprendizaje comienza por exponer las distintas tipologías de aeronaves para el transporte de mercancías, mostrando ejemplos. A continuación se profundiza en las ventajas e inconvenientes del transporte de ...
An analytical model for the prediction of thermal track buckling in dual gauge tracks

Villalba Sanchis, Ignacio; Insa Franco, Ricardo; Salvador Zuriaga, Pablo; Martínez Fernández, Pablo (SAGE Publications, 2018)

[EN] In rail transport, track gauge is one of the principal factors that condition the passage of trains. For technical and economic reasons, in some circumstances it is necessary to build and operate the so-called dual ...
An artificial neural network model as a preliminary track design tool

Montalbán Domingo, María Laura; Fernández-Villa, J. A.; Masanet Sendra, Claudio; Real Herráiz, Julia Irene (SAGE PUBLICATIONS LTD, 2015)

The formula derived from Zimmermann s theory is commonly used in railway track design. However, this formula depends on variables such as the ballast coefficient, which are difficult to determine. In recent years, numerical ...
An Energy-efficient Metro Speed Profiles for Energy Savings: Application to the Valencia Metro

Villalba Sanchis, Ignacio; Salvador Zuriaga, Pablo (Elsevier, 2016)

[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 ...
Analysis of false waves in numerical sea simulations

Giménez Valentín, Marcos Herminio; Sánchez Carratalá, Carlos Rafael; Medina, Josep R. (Elsevier, 1994)

[EN] It is common practice to consider the random sea waves as a succession of discrete waves characterized by individual amplitudes and periods. The zero-up-crossing criterion for discretizing waves, as well as other ...
Analysis of the impact of adverse weather on freeway free-flow speed in Spain

Camacho-Torregrosa, Francisco Javier; García García, Alfredo; Esplugues Belda, Enrique (Transportation Research Board, 2010)

[EN] Weather conditions affect traffic flow characteristics, including speed and capacity. Several studies have stated that rain, snow, wind speed, and visibility loss cause reductions in speed and capacity. Understanding ...
Analysis of the influence of 3D coordination on the perception of horizontal curvature using driving simulator

García García, Alfredo; Tarko, Andrew; Dols Ruiz, Juan Francisco; Moreno Chou, Ana Tsui; Calatayud, D. (Carlos Benedetto, 2011)

[EN] The presented research used a driving simulator to study the effect of isolated vertical crest curves overlapped with horizontal curves on driver¿s perception and behavior. The curves were consistent with the existing ...
Analysis of the influence of cracked sleepers under static loading on ballasted railway tracks

Montalbán Domingo, María Laura; Zamorano Martin, C.; Palenzuela Aviles, C.; Real Herráiz, Julia Irene (Hindawi Publishing Corporation, 2014)

The principal causes of cracking in prestressed concrete sleepers are the dynamic loads induced by track irregularities and imperfections in the wheel-rail contact and the in-phase and out-of-phase track resonances. The ...
Analysis of the Influence of Geometric Design Consistency on Vehicle CO2 Emissions

Llopis-Castelló, David; Camacho-Torregrosa, Francisco Javier; García García, Alfredo (Elsevier, 2019)

[EN] Highway vehicles driving on rural roads account for more than 50% of all CO2 emissions produced by the transportation sector in Europe. Although the policy measures to mitigate Greenhouse Gas emissions are increasing, ...
Analysis of the influence of under sleeper pads on the railway vehicle/track dynamic interaction in transition zones

Insa Franco, Ricardo; Salvador Zuriaga, Pablo; Inarejos Mesa, Javier; Roda Buch, Alejandro (SAGE PUBLICATIONS LTD, 2012)

[EN] Sharp changes in the vertical stiffness levels of a track can increase train and infrastructure deterioration to the point where there is a serious risk of a derailment. Major overloading and unloading forces are ...
Analysis of the Logistics of Home Delivery of Food and Household Goods. Implementation in Consum in the Valencia Area. Proposals for Improvement

Arroyo-López, María Rosa; Colomer Ferrandiz, José Vicente (Elsevier, 2016)

[EN] The problem of urban distribution in large cities, particularly the home delivery of goods, does not have a simple solution, given that it involves a range of different factors and parties with different interests. ...
Analysis of the performance of under-sleeper pads in highspeed line transition zones

Insa Franco, Ricardo; Salvador Zuriaga, Pablo; Inarejos Mesa, Javier; Medina González, Luis (Thomas Telford Ltd., 2014)

[EN] In many high-speed railway lines, the zones between embankments and structures may present some discontinuities, in terms of track geometry and track stiffness, which may create discomfort for passengers, induce ...
Analysis of the vibration alleviation of a new railway sub-ballast layer with waste tyre rubber

Hidalgo Signes, Carlos; Martínez Fernández, Pablo; Medel Perallon, Elías; Insa Franco, Ricardo (Springer - RILEM Publishing, 2017)

[EN] This paper focuses on the assessment of the vibration behaviour of granular sub-ballast materials mixed with rubber particles from scrap tyres. The main objective is to evaluate whether these mixes attenuate vibrations ...
Analysis of traffic accident severity using Decision Rules via Decision Trees

Abellán, J.; López-Maldonado, Griselda; De Oña, J. (Elsevier, 2013)

[EN] A Decision Tree (DT) is a potential method for studying traffic accident severity. One of its main advantages is that Decision Rules can be extracted from its structure and used to identify safety problems and establish ...
Analysis of traffic accidents on rural highways using Latent Class Clustering

De Oña, Juan; López-Maldonado, Griselda; Mujalli, Randa; Calvo, Francisco J. (Elsevier, 2013)

[EN] One of the principal objectives of traffic accident analyses is to identify key factors that affect the severity of an accident. However, with the presence of heterogeneity in the raw data used, the analysis of traffic ...
Analysis of vibrations in a modeled ballasted track using measured rail defects.

Real Herráiz, Julia Irene; Asensio Serrano, Tamara; Montalbán Domingo, María Laura; Zamorano, Clara (Research Center of the Public Institution "Vibromechanika", 2012-06)

Vibrations caused by trains and transmitted to the ground and structures nearby are a known source of problems related to railways. Therefore this phenomenon should be studied in detail to avoid a negative impact in the ...