Análise da influência de parâmetros geométricos de rodovias na frequência e severidade de acidentes rodoviários

Abstract

Given the need to provide safety from the infrastructure to the operation of the various modes of transport, this paper sought to analyze the influence that geometric parameters of highways have on the frequency and severity of accidents. This analysis was made for a 60.9 km stretch of highway BR-116, between Pacajus (km 52.90) and Boqueirão do Cesário (km 113.20), in the state of Ceará. The geometric parameters initially used were central angle, radius, development and superelevation, all obtained through the Executive Engineering and Environmental Studies Project for Duplication of Segment BR-116/CE, a document prepared by the National Department of Transport Infrastructure (DNIT), in 2014. Data on the history of road accidents were obtained from the Federal Highway Police (PRF) records, from January 2014 to June 2019. With the records it became possible to prepare of a database that gathered the geometric parameters for their respective curves. After a descriptive analysis of the data, the Negative Binomial (BN) model was adopted for accident frequency modeling and for severity a quantitative analysis was performed. The results show that the development variable has a strong impact on the frequency of accidents and that a significantly high proportion of the total accidents occur in curved sections, with a high possibility of accidents of severe severity.