Perceived Ability and Influencing Factors of the Signage System for Color Vision Deficiency Groups:A Case Study of Metro Travel Processe

Abstract In the process of wayfinding, people with color vision deficiency (CVD) find it difficult to search and understand the relevant signage and guidance information, which reduces the efficiency of wayfinding decision-making of travellers. The current research on CVD mainly focuses on the digital media interface, and there is a lack of exploration of the signage perception ability of CVD groups in complex environments. In this study, we selected metro travel as the type of behaviour to be studied, chose Xiamen Metro Lvcuo Station and four nodes in the surrounding urban area as the research scope, considered the two pairs of influencing factors of the environment and color vision, and used 360° panoramic view and simulation of CVD to implement the information search experiment, and made a comparative analysis of the relevant eye-movement and visual indexes. The experimental results show that subjects with simulated CVD have a significantly weaker ability to perceive the current signage system than normal color vision (NCV) subjects, and have the ability to be less easily disturbed by the colorful visual environment; changes in the outdoor light environment also significantly affect the ability of the experimental subjects to perceive the signage system. The study explores travel environment enhancement strategies that are friendly to the CVD group based on their unique visual recognition needs. It advocates the analysis of the key points of urban public space design with the concept of inclusiveness, and provides a theoretical basis for the subsequent inclusive construction and optimisation of cities.