RT info:eu-repo/semantics/article
T1 Geometric road design factors affecting the risk of urban run-off crashes. A case-control study
A1 Álvarez, Patricia
A1 Fernández, Miguel A.
A1 Gordaliza, Alfonso
A1 Mansilla, Alberto
A1 Molinero, Aquilino
K1 Accident Prevention
K1 Case-Control Studies
K1 City Planning
K1 Logistic Models
K1 Motor Vehicles
AB Objective Single vehicle run-off crashes in urban areas constitute a growing problem that deserves more attention from authorities and researchers. This study aims to detect geometric road design risk factors characterizing places where urban run-off crashes might happen. Methods A case-control study was performed in the urban area of Valladolid (Spain) with data corresponding to a four-year period. Logistic regression models were used to analyze data, considering different variables related to design parameters in the models: type of intersection, radius of curvature, width of the pavement, width of the traffic lane, number of lanes for traffic in the same direction, direction of the traffic, length of the previous straight section, distance to the previous traffic light, slope, and finally, priority regulation. Two different scenarios were investigated: intersections and curves. Results The Adjusted Odds-Ratio of a run-off crash was five times higher in double direction roads with median strip than in one-way urban roads, for both curves and intersections, and almost nine times higher on road sections with previous straight lengths greater than 500 meters. Specific risk factors for intersections are “number of lanes for traffic in the same direction” (the odds of a run-off crash are more than five times higher on a road with two or more lanes), “length of preceding straight section” (the odds on road sections with lengths greater than 500 meters are more than nine times that of road sections with a length of less than 150 meters). For curves, specific factors are “width of the traffic lane” (the odds of a run-off crash on curves with lanes wider than 3.75m are more than six times higher) and “priority regulation” (the odds of a run-off crash increases more than twelve times on road sections with traffic light regulation over those without any regulation). Conclusions The current study identifies urban road configurations that might require redesigning with the aim of decreasing the odds of a run-off crash, or the implementation of passive protective systems to mitigate their consequences. Specifically, intersections in two direction roads with median strip, more than two lanes per direction and a long preceding straight section, as well as curves with wide lanes and traffic light regulation, are the places that require attention.
PB Public Library of Science
YR 2020
FD 2020
LK https://uvadoc.uva.es/handle/10324/64727
UL https://uvadoc.uva.es/handle/10324/64727
LA spa
NO PLoS ONE, Volume 15, Issue 6, June 2020, Article number e0234564, p. 1-14.
NO Producción Científica
DS UVaDOC
RD 28-may-2024