Abstract
One of the most important aims of driver assistance systems is the prevention of accidents. Onboard-sensors, algorithms, and other technologies allow developing strategies to achieve this, for example by warning drivers in critical situations. Depending on the remaining time, different driver reactions may have to be elicited. In some situations it may be sufficient to slow down well in advance or to change lanes. However, in other situations only an emergency braking or a fast evasive manoeuvre can prevent a collision. Since in most situations drivers are still in control of the car, the question arises of how to best support them in these kinds of situations. This encompasses two basic HMI aspects: (1) How can the required reactions be elicited in drivers, before the system has to intervene automatically due to the increased criticality and reduced time left? In such a very critical situation, (2) how can drivers be explained how and why the assistance system has taken over and intervened? Within the scope of the UR:BAN project, HMI concepts were developed and evaluated with regard to these aspects of intervention and warning strategies. The chapter gives an overview about the conducted studies and resulting HMI concepts.
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