Ergonomics Factors in Traffic Sign Design

Traffic sign is the language of a traffic controller. Being an important human-machine interface in traffic system, rationality of traffic sign design is directly related to traffic safety and traffic efficiency. The design must match the physiological and psychological characteristics of human beings. In this paper, key factors in the traffic sign design are studied based on Ergonomics theory. The adaptabilities of the current traffic signs are investigated, analyzed and the inadequacies of the existing traffic signs are highlighted. The necessary improvements in traffic sign design are suggested.