The effectiveness of new 3D visual effect speed hump in speed reductionKamarudin Ambak, Suhailah Jemari, Basil David Daniel, Mohd Hanifi Othman and Muhamad Nazri BorhanMATEC Web Conf., 250 (2018) 02001DOI: https://doi.org/10.1051/matecconf/201825002001