China’s total fixed-asset investment in transport infrastructure hit 488.9 billion yuan ($72.66 billion) from January to March this year, up 4.8 percent from a year earlier, according to official data published on Sunday. China’s spending on railways rose 10 percent to 101.2 billion yuan for the quarter, while its investment in high-speed highways reached 191.5 billion yuan, up 12.6 percent on-year, according to an online statement published by the Ministry of Transport. China is ramping up infrastructure investment to boost its slowing economy. The state planner approved 370.3 billion yuan worth of fixed-asset investment projects in the first quarter, mainly in energy, transportation and high-tech sectors.