F6-1　Measuring Methods of Luminance Contrast around Tactile Walking Surface Indicators at Stations

Abstract

Luminance contrast between tactile walking surface indicators (TWSIs) and their surrounding surfaces is important for people with low vision when they walk by themselves. Although the Japanese accessibility guidelines for public transport currently give no numerical criteria of luminance contrast around TWSIs, it may not be long before the guidelines introduce such criteria. This means that practical methods to measure luminance contrast around TWSIs will be required in stations in the near future. Preparing for it, we developed a manual on measuring methods of luminance contrast around TWSIs, taking environmental characteristics of stations into consideration. This paper reports the process of our making of the manual.