The Invisible Hand: How to Design the Best Interaction Between Advanced Driver Assistance Systems and Car Users

In this paper, the invisible hand concept for the definition of Advanced Driver Assistant Systems (ADAS) Human Machine Interfaces (HMI) is introduced. The main idea is that these systems become a sort of "invisible hand'' able to support the driver and to increase driving safety if they are integrated with each other (i.e., longitudinal, lateral and rear control) and the most "persuasive'' and "efficient'' interaction between driver and ADA systems is developed. Here the analysis is conducted taking into consideration the technological evolution scenario and the identification of related user interaction aspects (including technical and communication analysis). Moreover, the ways to design the best interaction between drivers and ADAS interfaces from communication and HMI points of view has been included as well as an overview of the user centered approach adopted in the Centro Ricerche Fiat's design process.