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Analysis of the impact of adverse weather on freeway free-flow speed in Spain

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Analysis of the impact of adverse weather on freeway free-flow speed in Spain

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dc.contributor.author Camacho-Torregrosa, Francisco Javier es_ES
dc.contributor.author García García, Alfredo es_ES
dc.contributor.author Esplugues Belda, Enrique es_ES
dc.date.accessioned 2018-10-06T04:33:43Z
dc.date.available 2018-10-06T04:33:43Z
dc.date.issued 2010 es_ES
dc.identifier.issn 0361-1981 es_ES
dc.identifier.uri http://hdl.handle.net/10251/109813
dc.description.abstract [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 these relationships is important to managing the traffic flow appropriately. This paper presents new research that evaluates the free-flow speed reduction caused by inclement weather conditions, including rain, snow, wind speed, and visibility loss. Fifteen freeway locations in northwestern Spain were selected for the study. Data were collected in 15-min intervals by weather and traffic stations for almost 3 years, from 2006 to 2008. Individual correlations between the weather and traffic variables were examined to select the most important weather variables and to identify speed trends and thresholds. All climate conditions were divided into four groups: no precipitation and temperatures above 0 C, no precipitation and temperatures below 0 C, rain, and snow conditions. A multiple nonlinear regression analysis was performed with the final variables. Results showed that rain and snow both caused a reduction in speed, with a more dramatic reduction during snow conditions. Wind speed over 8 m/s affected traffic speed, while the effect of visibility loss presented a logarithmic form. It was also determined that the location caused the variables to affect the speed differently, so further research should utilize a greater number of sites. es_ES
dc.description.sponsorship The authors thank the Center for Studies and Experimentation of Public Works (CEDEX) of the Spanish Ministry of Public Works, which subsidized this research, included in a research project, METEOSAFETY: Study to Reduce Accidents in Case of Weather Problems. The authors also thank the Ministry of the Interior, General Directorate of Traffic, Spain, for cooperation in field data gathering.
dc.language Inglés es_ES
dc.publisher Transportation Research Board es_ES
dc.relation.ispartof Transportation Research Record es_ES
dc.rights Reserva de todos los derechos es_ES
dc.subject.classification INGENIERIA E INFRAESTRUCTURA DE LOS TRANSPORTES es_ES
dc.title Analysis of the impact of adverse weather on freeway free-flow speed in Spain es_ES
dc.type Artículo es_ES
dc.identifier.doi 10.3141/2169-16 es_ES
dc.rights.accessRights Cerrado es_ES
dc.contributor.affiliation Universitat Politècnica de València. Departamento de Ingeniería e Infraestructura de los Transportes - Departament d'Enginyeria i Infraestructura dels Transports es_ES
dc.description.bibliographicCitation Camacho-Torregrosa, FJ.; García García, A.; Esplugues Belda, E. (2010). Analysis of the impact of adverse weather on freeway free-flow speed in Spain. Transportation Research Record. 2169:150-159. doi:10.3141/2169-16 es_ES
dc.description.accrualMethod S es_ES
dc.relation.publisherversion http://doi.org/10.3141/2169-16 es_ES
dc.description.upvformatpinicio 150 es_ES
dc.description.upvformatpfin 159 es_ES
dc.type.version info:eu-repo/semantics/publishedVersion es_ES
dc.description.volume 2169 es_ES
dc.relation.pasarela S\39965 es_ES
dc.contributor.funder Centro de Estudios y Experimentación de Obras Públicas


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