Addressing sight-distance-related safety effects of installing median barriers at horizontal curves of undivided highways under a 3D approach

Santos Berbel, César de; González Gómez, Keila; Castro Malpica, Maria y Anta, José A. (2018). Addressing sight-distance-related safety effects of installing median barriers at horizontal curves of undivided highways under a 3D approach. En: "5th International Conference on Road and Rail Infrastructure", 17 al 19 de Mayo 2018, Zadar, Croacia. pp. 1067-1073.

Descripción

Título: Addressing sight-distance-related safety effects of installing median barriers at horizontal curves of undivided highways under a 3D approach
Autor/es:
  • Santos Berbel, César de
  • González Gómez, Keila
  • Castro Malpica, Maria
  • Anta, José A.
Tipo de Documento: Ponencia en Congreso o Jornada (Artículo)
Título del Evento: 5th International Conference on Road and Rail Infrastructure
Fechas del Evento: 17 al 19 de Mayo 2018
Lugar del Evento: Zadar, Croacia
Título del Libro: Proceedings of the 5th International Conference on Road and Rail Infrastructure
Fecha: 2018
Materias:
Escuela: E.T.S.I. Caminos, Canales y Puertos (UPM)
Departamento: Ingeniería Civil: Transporte y Territorio
Licencias Creative Commons: Reconocimiento - Sin obra derivada - No comercial

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Resumen

Concrete barriers are often installed to separate opposing directions of traffic at hazardous horizontal curves on undivided highways in order to avoid frequent types of crashes such as head-on collisions. Whereas this treatment is effective for preventing head-on crashes, they reduce the available sight distance (ASD). The estimation of sight distance is usually performed under a two-dimensional (2D) approach, despite the three-dimensional (3D) nature of facilities. Radius curve, clearance and trajectory location on cross section are the only variables considered under the planar approach, ignoring the spatial component. To overcome this limitation, this study applies a 3D sight distance estimation method, where the sight distance reduction caused by installing barriers is evaluated, contemplating their shape and position in a detailed fully 3D model. The procedure facilitates incorporating mass standardized constructive elements into the highway model. This method consists of a geoprocessing model on a geographic information system (GIS), where the impact of the terrain, the roadway itself, and the road furniture on sight distance is broached. The results evidenced that the ASD outcomes were different under either approach. In addition, the ASD fell below the required stopping sight distance (SSD) of the standards under either approach. A potential application of this method is the analysis of the overall safety effects and the subsequent evaluation of crash modification factors associated to this safety measure.

Proyectos asociados

TipoCódigoAcrónimoResponsableTítulo
Gobierno de EspañaTRA2015-63579-RSin especificarUniversidad Politécnica de MadridNuevas tecnologías geoespaciales para estudios de seguridad vial

Más información

ID de Registro: 51101
Identificador DC: http://oa.upm.es/51101/
Identificador OAI: oai:oa.upm.es:51101
Depositado por: Memoria Investigacion
Depositado el: 29 May 2018 10:12
Ultima Modificación: 29 May 2018 10:12
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