A model for the visual effect evaluation of a urban road indicating device

For an urban road indicating device, Variable Message Signs (VMS) screen system is used to publish and display all kinds of traffic information, including the condition of current and nearby roads and the useful travel advice, which leads to the topic that the VMS screen visual effect is a crucial issue. Therefore, a model for the visual effect evaluation of VMS screen with the simulation method is studied in this paper. Firstly, establish a reasonable evaluation index system; secondly, build a VMS screen dynamic evaluation model based on Analytic Hierarchy Process (AHP) method and two-level fuzzy comprehensive evaluation method; in addition, select one VMS screen in Beijing as an example, then evaluate the visual effect comprehensively by simulation. Finally, optimize simulation parameters by field driving, which makes the model more effective and more practical. It provides an innovative way to improve VMS design standards.