Traffic management systems are complex networks integrating sensors, actors, communication on different levels and humans as active part, consisting of road-side infrastructure coupled with advanced driver assistance systems and on-board data collection facilities.
has the objective of co-operative traffic management by implementing intelligent services interfacing vehicles, drivers, road infrastructure and highway operators. These services have different levels of criticality and safety impact, and involve different types of smart systems and wireless communications. In the initial phase of the COOPERS project a RAMSS
analysis was carried out on road traffic scenarios, services and communications. The analysis yielded that the HMI (Human Machine Interface) is one of the major threats to reliability.
After a short overview on COOPERS and the RAMSS analysis, this paper describes the risks of the HMI and human factors in the specific situation of a driver and gives concrete recommendations for the OBU (On-Board Unit) user interface.