ABSTRACT
Assessment of driver mental workload has been actively studied since in-vehicle system was introduced because drivers have to perform in-vehicle tasks in addition to driving the vehicle. Workload measurement methods quantify the relative relationship between a task demand and driver’s attentional resources allocated to a task. In-car interaction design means the designing of interactive behavior between in-car systems and drivers. Drivers, who are not accustomed to audio input, have not memorized prepared audio commands yet and are not sure what to say. Cellular phone use while driving has come under intense scrutiny as it is considered a typical driver-distraction situation. Verwey selected driving courses with a variety of road environments, had the drivers perform secondary tasks and measured the workload at each situation of the road. The process to achieve a goal can be adopted by four-stage model for information processing: information acquisition, information analysis, decision selection and action execution.
