The aim of automated driving is to allow all or part of the driving task to be delegated to the vehicle. A problem arises for the driver: what is his role at all times? In the automobile, activities related to safety and comfort are mainly based on information exchange loops between the environment, the vehicle (via its HMI) and the driver. It is fundamental that what is expected from the driver in terms of perception, interpretation, decision making and action is compatible with his cognitive abilities. The interest of a multimodal HMI is to optimise the interaction between the system and its user by taking advantage of the benefits of each modality. Multimodality also allows the urgency of successive messages to be graduated. The project aimed to study the multimodal interfacing of automated vehicles and to determine the effects on the interaction with the driver.

• Explorative study of a collaborative project.
• Methodological approach.
• Effects of interfacing on driver interaction.