由于到2030年,预计重型车辆将占石油消费增长的40%,其将鼓励采用重型天然气车辆。2013年6月25日,美国总统奥巴马在位于华盛顿的乔治城大学的演讲中宣布了一系列应对全球气候变化的新计划。其中包括为2018年后新的重型车制定燃料经济性标准。据悉,奥巴马政府曾于2011年完成了2014—2018车型年 By 2030, heavy vehicles are expected to account for 40% of oil consumption growth, which will encourage the use of heavy natural gas vehicles. On June 25, 2013, U.S. President Barack Obama announced at the University of Georgetown in Washington a series of new plans to tackle global climate change. These include setting fuel economy standards for new heavy vehicles after 2018. It is reported that the Obama administration completed the 2014-2018 model year in 2011