Calibration to Local Conditions of Geometry-Based Operating Speed Models for Urban Arterials and Collectors

摘要

The research aims to establish the correlation of roadway design features to operating speed in the Italian urban environment elaborating multiple-linear models able to predict the observed speed with these design variables as covariates. Furthermore, a cross-country comparison with other models was pursued, establishing their consistency with the Italian dataset through a re-calibration study. The project focused on road segments characterized by dissimilar geometric features. Speed measurements were carried out at each different station per segment under free-flow conditions. Different models were calculated, combining both the complete dataset and disaggregating for the different road typologies.