  Intuitive interaction has long been seen as a highly user-friendly method.
There are attempts to implement intuitive interfaces in vehicles in both
research and industrial, such as voice commands. However, there is a lack of
exploration in the in-vehicle multi-modal intuitive interaction, especially
under a dynamic driving scenario. In this research, we conducted a design
workshop (N=6) to understand user's needs and designers' considerations on the
in-vehicle multi-modal intuitive interface, based on which we implemented our
design on both a simulator and a real autonomous vehicle using Wizard-of-Oz. We
conducted a user experiment (N=12) on the simulator to explore determinants of
users' acceptance, experience, and behavior. We figured that acceptance was
significantly influenced by six determinants. Drivers' behavior has an obvious
pattern of change. Drivers have been proven to have less workload but
distractions were also reported. Our findings offered empirical evidence which
could give insights into future vehicle design.
