Analysis of the visual safety perception and the clarity of traffic signs and road markings in the presence of road lighting in straight and curved roadEndah Setyaningsih, Leksmono Suryo Putranto, Soegijanto and F.X. Nugroho SoelamiMATEC Web Conf., 181 (2018) 04001DOI: https://doi.org/10.1051/matecconf/201818104001