The effectiveness of new 3D visual effect speed hump in speed reduction Kamarudin Ambak, Suhailah Jemari, Basil David Daniel, Mohd Hanifi Othman and Muhamad Nazri Borhan MATEC Web Conf., 250 (2018) 02001 Published online: 11 December 2018 DOI: 10.1051/matecconf/201825002001