The purpose of this review is to emphasize the importance of perceptual processes in driving. While perception of one's ownspeed determines the speed chosen for driving, time to contact and V, distance perceptions affect the decisions they take during driving. In addition, the spatial and temporal limits to the peripheral capacity, habilitation effects, and perceptual illusions have an impact on the deterioration of driving performance. Road safety can be substantially improved by designing the physical environment, especially roads and road signs, and the vehicles consistent with delivers' perceptual abilities and capacities as well as training the drivers regarding their perceptual capacity and other relevant factors influencing this capacity.