Christine Tessele Nodari

Safety performance models for urban intersections in Brazil

This 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 Brasília. 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 Brasília, 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 Cx) to the city of Porto Alegre. The models were adjusted following the Highway Safety Manual (HSM) calibration procedure and yielded Cx 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.

Vulnerabilidad ambiental, social y vial en accidentes con transporte de productos peligrosos: estudio de caso en la BR-101 entre Osório y Torres, Río Grande do Sul, Brasil

O presente estudo objetiva avaliar a vulnerabilidade ambiental e social e identificar trechos criticos, na ocorrencia de acidentes com o transporte de produtos perigosos na BR-101, entre os municipios de Osorio e Torres, Rio Grande do Sul, Brasil. A abordagem proposta e aplicada neste trabalho consiste de uma analise multicriterial que integra metodologias de analise de seguranca viaria, analise de vulnerabilidade ambiental e social na ocorrencia de acidentes com produtos perigosos, e tecnicas de analise de mapas. Os resultados apontaram que 38 quilometros da rodovia apresentam vulnerabilidade elevada, sendo 8 quilometros com vulnerabilidade critica, vinculada a presenca de pontes sobre rios, pontos de captacao de agua, tunel, areas de preservacao ambiental e zona urbana. Esses trechos devem ser priorizados no desenvolvimento de planos de acao para a mitigacao de acidentes e definicao de politicas publicas na rodovia em estudo. A abordagem utilizada constitui um enfoque inedito em relacao aos estudos existentes e uma ferramenta que pode auxiliar no processo de tomada de decisoes em operacoes de emergencia.This study aimed to assess the environmental and social vulnerability and identify critical highway stretches for accidents involving transportation of hazardous products on the BR-101 highway between the cities of Osório and Torres in Rio Grande do Sul State, Brazil. The studys approach consisted of a multiple-criteria analysis combining highway safety analysis and environmental and social vulnerability analysis in the occurrence of accidents with hazardous products, plus cartographic analysis techniques. Thirty-eight kilometers of the highway showed high vulnerability, of which 8 kilometers with critical vulnerability, associated with bridges over rivers, water uptake points, a tunnel, environmental preservation areas, and an urban area. These stretches should be prioritized when developing action plans for accident mitigation and development of public policies for this highway. This proved to be an unprecedented approach when compared to existing studies and a potentially useful tool for decision-making in emergency operations.

[Environmental, social, and roadway vulnerability in accidents involving transportation of hazardous products: a case study of the BR-101 highway between Osório and Torres in Rio Grande do Sul State, Brazil].

O presente estudo objetiva avaliar a vulnerabilidade ambiental e social e identificar trechos criticos, na ocorrencia de acidentes com o transporte de produtos perigosos na BR-101, entre os municipios de Osorio e Torres, Rio Grande do Sul, Brasil. A abordagem proposta e aplicada neste trabalho consiste de uma analise multicriterial que integra metodologias de analise de seguranca viaria, analise de vulnerabilidade ambiental e social na ocorrencia de acidentes com produtos perigosos, e tecnicas de analise de mapas. Os resultados apontaram que 38 quilometros da rodovia apresentam vulnerabilidade elevada, sendo 8 quilometros com vulnerabilidade critica, vinculada a presenca de pontes sobre rios, pontos de captacao de agua, tunel, areas de preservacao ambiental e zona urbana. Esses trechos devem ser priorizados no desenvolvimento de planos de acao para a mitigacao de acidentes e definicao de politicas publicas na rodovia em estudo. A abordagem utilizada constitui um enfoque inedito em relacao aos estudos existentes e uma ferramenta que pode auxiliar no processo de tomada de decisoes em operacoes de emergencia.This study aimed to assess the environmental and social vulnerability and identify critical highway stretches for accidents involving transportation of hazardous products on the BR-101 highway between the cities of Osório and Torres in Rio Grande do Sul State, Brazil. The studys approach consisted of a multiple-criteria analysis combining highway safety analysis and environmental and social vulnerability analysis in the occurrence of accidents with hazardous products, plus cartographic analysis techniques. Thirty-eight kilometers of the highway showed high vulnerability, of which 8 kilometers with critical vulnerability, associated with bridges over rivers, water uptake points, a tunnel, environmental preservation areas, and an urban area. These stretches should be prioritized when developing action plans for accident mitigation and development of public policies for this highway. This proved to be an unprecedented approach when compared to existing studies and a potentially useful tool for decision-making in emergency operations.

Vulnerabilidade ambiental, social e viária em acidentes com transporte de produtos perigosos: estudo de caso na BR-101 entre Osório e Torres, Rio Grande do Sul, Brasil

O presente estudo objetiva avaliar a vulnerabilidade ambiental e social e identificar trechos criticos, na ocorrencia de acidentes com o transporte de produtos perigosos na BR-101, entre os municipios de Osorio e Torres, Rio Grande do Sul, Brasil. A abordagem proposta e aplicada neste trabalho consiste de uma analise multicriterial que integra metodologias de analise de seguranca viaria, analise de vulnerabilidade ambiental e social na ocorrencia de acidentes com produtos perigosos, e tecnicas de analise de mapas. Os resultados apontaram que 38 quilometros da rodovia apresentam vulnerabilidade elevada, sendo 8 quilometros com vulnerabilidade critica, vinculada a presenca de pontes sobre rios, pontos de captacao de agua, tunel, areas de preservacao ambiental e zona urbana. Esses trechos devem ser priorizados no desenvolvimento de planos de acao para a mitigacao de acidentes e definicao de politicas publicas na rodovia em estudo. A abordagem utilizada constitui um enfoque inedito em relacao aos estudos existentes e uma ferramenta que pode auxiliar no processo de tomada de decisoes em operacoes de emergencia.This study aimed to assess the environmental and social vulnerability and identify critical highway stretches for accidents involving transportation of hazardous products on the BR-101 highway between the cities of Osório and Torres in Rio Grande do Sul State, Brazil. The studys approach consisted of a multiple-criteria analysis combining highway safety analysis and environmental and social vulnerability analysis in the occurrence of accidents with hazardous products, plus cartographic analysis techniques. Thirty-eight kilometers of the highway showed high vulnerability, of which 8 kilometers with critical vulnerability, associated with bridges over rivers, water uptake points, a tunnel, environmental preservation areas, and an urban area. These stretches should be prioritized when developing action plans for accident mitigation and development of public policies for this highway. This proved to be an unprecedented approach when compared to existing studies and a potentially useful tool for decision-making in emergency operations.