Assessing the Environmental Performances of Urban Roundabouts Using the VSP Methodology and AIMSUN

In line with globally shared environmental sustainability goals, the shift towards citizen-friendly mobility is changing way people move through cities and road user behaviour. Building a sustainable transport requires design knowledge to develop increasingly green infrastructures monitoring impacts from mobile crowdsourced data. this view, paper presents an empirically based methodology that integrates vehicle-specific power (VSP) model microscopic traffic simulation (AIMSUN) estimate second-by-second vehicle emissions at urban roundabouts. The distributions of time spent in each VSP mode instantaneous trajectory data gathered field via smartphone were starting point analysis. versatility AIMSUN calibrating parameters better reflect field-observed speed-time trajectories enhance estimation accuracy was assessed. conversion existing roundabout within sample into turbo counterpart also made as attempt confirm reproducibility proposed procedure. results shed light on new opportunities performance evaluation units when changes or operation should be considered management strategies highlighted potential smart approach collecting big amounts digital communities.