抄録
Condensation is a state change when the temperature drops below the dew point, and the moisture contained within the atmosphere forms dew on surfaces. This type of condensation caused problems on roads and road facilities. Especially, if vapors occur in the form of dew on road signs, problems in retro-reflectivity, visibility, and legibility of road signs may occur, resulting in difficulty in providing information. In order to make improvements for such problems that arise as condensation forms on road signs, dew-resistance films, illuminated road signs, and heating cables are currently being used. However there is no test method to analyze the effectiveness of anti-dew road sign method. Therefore in this research, an experiment method was developed to simulate real-world conditions and verified the performance of an anti-dew road sign using thermohygrostats in the laboratory. Comparisons were also conducted between the value of theoretic concepts and the value of the research.
