Abstract
Creating qualitative measures of driver workload is a major challenge associated with matching road, transportation, and environmental conditions to driver ability. Furthermore, humanizing road safety should reduce accidents. This study had two parts: seventeen drivers were tested in a simulator cabin that emulated a scenic which is the same as a test highway. Six drivers were tested on a real highway. Driver workload was assessed by measuring the changes in heart rate and pupil size. The authors found road alignment and driver workload are inversely correlated at certain speeds. The authors divided driver workload into three levels: comfortable, moderate tension, and high tension. Regression analysis was used to determine the differences among levels. Despite similar conditions, a difference in driver workload between the simulation and the real highway was observed. The results were used to obtain three levels of control criteria for pupil size and heart rate, which was used to evaluate driver workload.
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