... regardless to the height of masts, vehicle’s roof as well as intensity of illumination. Therefore, the drive could also reduced risk of damaging the load and the warehouse by activating the OBW ... illumination. Keywords: Observe -by- wire, haptic interface, visibility, forklift, mast, forklift, steer -by- wire, human factors. concept of observe -by- wire, which is a haptic-based approach ... term of the sense of touch. 2.2 Feedback force implementation: According to previous research [9], [10], the steering system of forklifts is developed. Moreover, driving torque of forklift...