Dissertação
Adaptação do HCM-6 para análise de rodovias de pista simples sem faixas adicionais no Brasil
Fecha
2021-08-30Autor
Juliângelo Kayo Sangi de Oliveira
Institución
Resumen
The Highway Capacity Manual (HCM) is one of the main documents used to analyze the level
of service and capacity of road components around the world. However, the application of its
methodology without adjusting local traffic conditions, roads, and vehicles and drivers’
characteristics can result in discrepancies between performance measures calculated from the
manual methodology and those observed in the field. In Brazil, several studies have shown that
the HCM method underestimates the level of service if local particularities are not considered.
The 6th edition of the manual will bring a new methodology for the analysis of two-lane
highways. This new methodology is expected to be based on the Final Report for NCHRP
Project 17-65 developed by the National Cooperative Highway Research Program. According
to this report, the level of service of two-lane highways will be determined by analyzing the
follower density (FD) measure. In this context, the objective of this work was to adjust the new
HCM-6 method - whose preliminary description can be found in the NCHRP Project 17-65
Report - to the conditions of Brazilian two-lane highways without climbing lanes. Thus, based
on field data collected in previous studies, a sensitivity analysis was performed to determine
the most relevant calibration parameters of the Aimsun Next traffic simulator. Once the
simulator is calibrated, simulation results were obtained for hypothetical segments to adjust
traffic models to obtain FD, according to the structure proposed in NCHRP Project 17-65, so
that they represent the data observed in the field. The results of FD showed that the HCM traffic
models need adjustments to be applied to evaluate Brazilian two-lane highways without
climbing lanes, in order to avoid underestimated levels of service concerning what is observed
in the field.