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Author(s): Flávio Cunto
Lucas Tito Pereira Sobreira
Sara Ferreira
Title: Assessing the Transferability of Highway Safety Manual Predictive Method for Urban Roads in Fortaleza City/Brazil
Issue Date: 2013
Abstract: The Highway Safety Manual (HSM) provides guidance to safety professionals becoming astandard of practice, particularly for regions where acting is urgent as a result of an overall lackof safety investments leading to persistently high crash frequencies. Differences in crash datasystems, local enforcement, driving behavior, and other factors have fostered researches focusedon assessing the international transferability of the HSM predictive method. The recent increasein crash occurrences in Brazilian urban areas and the decade of action for road safety WHOinitiative has motivated a nationwide joint safety research effort. One of the fundamentalquestions in this project is related to the applicability of HSM safety performance functions(SPFs) for the Brazilian urban environment. This paper presents the initial results regarding thetransferability of HSM SPFs for estimating expected average crash frequency of urbanintersections in Fortaleza City. The procedure applied comprehended two major steps: the firststep was focused on the estimation of the calibration factor according the procedure outlined inthe HSM, followed by a subsequent model validation effort using a different sample; the secondstep comprised an analysis of the overdispersion parameter k, either using the original estimatesfrom the HSM or recalibrated estimates using local conditions. The results suggested that for theFortaleza case, calibrated HSM baseline SPFs can be applied with caution. It is however,worthwhile analyzing the effect of the calibration sample
Subject: Engenharia civil, Engenharia civil
Civil engineering, Civil engineering
Scientific areas: Ciências da engenharia e tecnologias::Engenharia civil
Engineering and technology::Civil engineering
Source: Road Safety and Simulation
Document Type: Artigo em Livro de Atas de Conferência Internacional
Rights: restrictedAccess
Appears in Collections:FEUP - Artigo em Livro de Atas de Conferência Internacional

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