Abstract
A method for the measurement of the specific luminance of wet road markings has been validated. This method has been used to study the function of both conventional and corrugated road markings in wet and dry conditions. Twenty different types of road markings in all were tested in two experiments. The results show that the corrugated markings had a higher specific luminance in wet conditions, and thus better visibility in vehicle lighting, than the conventional, plane markings. Furthermore, the experiments showed that the durability of corrugated markings is inferior to that of plane markings. (A)