In this thesis, a multivariable system model of driver performance in the basic driving tasks is presented. The driver model described acts as a serial-process, priority-accessed, time-sharing computer. This model processes the input or output task which currently possesses the highest priority. Input tasks are represented by continuous signals sampled intermittently according to priority laws. Output tasks are modeled as simple analog processes operating on the last few intermittently generated output controls. An individual priority rule is constructed for each input and output task.
The performance of the driver in the lateral control task involves a feedforward pattern which is consequence of the fact the driver looks several feet ahead of the pathway. A laboratory analysis of the feedforward aspects of the driver in the single-input single-output lateral control task is described --Abstract, page ii
