An Auto PC interacts with a user through speech commands and auditory feedback, as well as key presses and images on the faceplate. Speech is the preferred interface because it enables a user to focus on driving. You must provide for both kinds of input and output.
An Auto PC visual interface is based on a form. A form is composed of a title bar and the application display area. The title bar provides limited user information concerning the active application and its function. The application display area contains controls that provide features such as lists, edit controls, and message text.
When you design an Auto PC application, follow these guidelines:
If a task requires focused attention, disable the task while the vehicle is in motion.
Consider the angle and distance of the driver in relation to the device.
Do not use color as the only means of communication because color perception varies.