Safety Evaluation of Flower Roundabout Considering Autonomous Vehicles Operation

With the significant technological growth that affected autonomous vehicles in last decade, several consequences occurred as: human factor exclusion, entry and exit manoeuvres precision from roundabouts, headway reduction. In this paper, it was carried out a microsimulation approach study aims to evaluate benefits terms of safety obtained with flower roundabouts scenario where traffic is characterized by conventional “CVs” Connected Autonomous Vehicles “CAVs”. This focused on evaluation CAVs CVs operation presence so called “weak users” or rather, pedestrians bikes. Then, simulated scenarios were zebra-crossings main roads, positioned at 20 m circulatory carriageway edges. Micro simulation choice due absence survey data collection because ordinary still minimal. The micro through VISSIM, operated specific methodological path, consisting, application, O–D matrix based real cases, order achieve an assessment potential conflicts relation increase CAVs. Simulation results showed higher levels achieved for special cases distribution present. Finally, considering crash related presence, interventions such roundabout types have be thorough. There 10 O/D matrices analysed VISSIM parameters average tail length, maximum speed, vehicles, number stops quantity. As reported conclusion section, minimum dynamic performances identified.