Improving Road Safety of Tank Truck in Indonesia by Speed Limiter Installation Hadi Pranoto, A.M Leman, Ishak Baba, Dafit Feriyanto and Gama Widya Putra MATEC Web Conf., 87 (2017) 02022 Published online: 12 December 2016 DOI: 10.1051/matecconf/20178702022