A Proposal of Risk Indexes at Signalised Intersections for ADAS Aimed to Road Safety

Statistical data show that road intersections are one of the critical areas for accidents. The analyses reported are aimed at estimate risk indexes, which might be provided on-board, when vehicles approach a road intersection regulated by traffic lights, by an ADAS based on the use of the infrastructure-to-vehicle (I2V) or vehicle-to-infrastructure (V2I) communication systems. Two possible uses of the risk indexes can be identified: if data can be detected in real time, the driver could be informed on-board of a potentially hazardous situation, using algorithms to predict the dynamics of the vehicle on the basis of the data detected from the monitoring; the other use would be detecting – in case the vehicle were already within the dilemma zone – the lowest risk manoeuvre and providing it the driver with a message on board. The paper also reports the effects which might be generated by this ADAS application.