Abstract
Collisions occur when the headway distance of a car is shorter than its stopping distance. Drivers have the tendency to drive faster to reach their destinations earlier. Driving in haste in this way reduces headway and therefore increases collision probability. In this research, the degree that driving in haste shortens traveling time and increases collision probability was investigated. The results of the experiments showed that driving in haste did not shorten traveling times as much as the subjects of the experiment expected. On the other hand, driving in haste greatly increased the probability of collision.