Safety performance models for urban intersections in Brazil

dc.contributorUniversidade Estadual Paulista (UNESP)
dc.creatorBarbosa, Heloisa
dc.creatorCunto, Flavio
dc.creatorBezerra, Barbara Stolte
dc.creatorNodari, Christine
dc.creatorJacques, Maria Alice
dc.date2015-03-18T15:53:14Z
dc.date2016-10-25T20:24:41Z
dc.date2015-03-18T15:53:14Z
dc.date2016-10-25T20:24:41Z
dc.date2014-09-01
dc.date.accessioned2017-04-06T07:02:06Z
dc.date.available2017-04-06T07:02:06Z
dc.identifierAccident Analysis And Prevention. Oxford: Pergamon-elsevier Science Ltd, v. 70, p. 258-266, 2014.
dc.identifier0001-4575
dc.identifierhttp://hdl.handle.net/11449/116390
dc.identifierhttp://acervodigital.unesp.br/handle/11449/116390
dc.identifier10.1016/j.aap.2014.04.008
dc.identifierWOS:000337855300029
dc.identifierhttp://dx.doi.org/10.1016/j.aap.2014.04.008
dc.identifier.urihttp://repositorioslatinoamericanos.uchile.cl/handle/2250/927037
dc.descriptionThis paper presents a modeling effort for developing safety performance models (SPM) for urban intersections for three major Brazilian cities. The proposed methodology for calibrating SPM has been divided into the following steps: defining the safety study objective, choosing predictive variables and sample size, data acquisition, defining model expression and model parameters and model evaluation. Among the predictive variables explored in the calibration phase were exposure variables (AADT), number of lanes, number of approaches and central median status. SPMs were obtained for three cities: Fortaleza, Belo Horizonte and Brasilia. The SPM developed for signalized intersections in Fortaleza and Belo Horizonte had the same structure and the most significant independent variables, which were AADT entering the intersection and number of lanes, and in addition, the coefficient of the best models were in the same range of values. For Brasilia, because of the sample size, the signalized and unsignalized intersections were grouped, and the AADT was split in minor and major approaches, which were the most significant variables. This paper also evaluated SPM transferability to other jurisdiction. The SPM for signalized intersections from Fortaleza and Belo Horizonte have been recalibrated (in terms of the COx) to the city of Porto Alegre. The models were adjusted following the Highway Safety Manual (HSM) calibration procedure and yielded C-x of 0.65 and 2.06 for Fortaleza and Belo Horizonte SPM respectively. This paper showed the experience and future challenges toward the initiatives on development of SPMs in Brazil, that can serve as a guide for other countries that are in the same stage in this subject. (C) 2014 Elsevier Ltd. All rights reserved.
dc.languageeng
dc.publisherElsevier B.V.
dc.relationAccident Analysis And Prevention
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.subjectSafety performance models
dc.subjectRoad safety
dc.subjectGeneralized linear models
dc.subjectObservational road safety studies
dc.subjectGeneralized Estimating Equations
dc.titleSafety performance models for urban intersections in Brazil
dc.typeOtro


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