The driving simulator, eye tracker and questionnaire are adopted to analyze and discuss the design scheme and reduced scale scheme of traffic signs under the condition of dense road network in small blocks. The speed and acceleration data collected by the driving simulator show that there is a significant difference between the design scheme and the reduced scale scheme. The eye tracker data display scale scheme needs more attention. The questionnaire shows that the most people cannot accurately feel the difference between the two schemes subjectively. The feasibility of the reduced scale scheme needs to be further studied.