... 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 to overcome ... transmit the view of forks’ environment in term of force feedback information, and we named it as observe-by-wire system. (a) (b) Fig. 2 The OBW system configuration, a forklift lifts loads ... clearly shown that the OBW system could improve the visibility as well as forklift performances. 2. OBSERVE BY WIRE FOR FORKLIFTS 2.1 System overview Operating a forklift is a specialized...