During the use of an ADF, the driver may be subject to many types of feedbacks, with various levels of urgency. It is important that s/he understands which HVI elements have high priority and convey urgent feedback. Equally, it is important that the driver understands that other messages are provided primarily for informational purposes and therefore do not require immediate action(s).
A simple example is an urgent transfer of control where the driver needs to re-gain situational awareness in a very short period of time. In this situation, visual feedback will not be sufficient. A multi-modal feedback approach would be much more effective. Feedback can be designed to help the driver to focus on the source of danger (Nishimura et al., 2015).
Main Question
Is the HMI designed to portray the urgency of each message?
Sub-Questions
- Are the semantics and tone of a message designed to be in accordance with its urgency?
- Are messages containing high priority information positioned close enough to the user’s line of sight?
- Are high priority messages presented in a multimodal way (e.g., visual, acoustic, haptic)?
- Are communications of sensor failures, their consequences and required user steps considered?
- Are warning messages designed to orient the user towards the source of danger?
References
- Nishimura, R., Wada, T. and Sugiyama, S. (2015) ‘Haptic shared control in steering operation based on cooperative status between a driver and a driver assistance system’, Journal of Human-Robot Interaction, 4(3), pp. 19-37.