重型车辆导致的增长 - 年均增长率为14.6％

  天然气，压缩天然气（CNG）和液化天然气（LNG），是增长最快的燃料在运输部门在美国，美国能源情报署（EIA）报告。代理项目二○一一年至2040年年均增长率为11.9％。CNG专配减压阀 627调压器，奥丽斯特减压阀

  重型车辆（HDVs） - 其中包括拖拉机拖车，职业的车辆，公交车，重型皮卡和面包车与车辆总重量评级（GVWR）10001磅或的 - 导致天然气需求的增长，在整个预测期间。HDVs从2011年的几乎为零上升到在2040年超过1万亿BTU天然气燃料消耗，年均增长率为14.6％。

  虽然HDVs以天然气为燃料，具有显着的增量成本与柴油动力相比，天然气消费量的增加HDVs促使柴油燃料相比，天然气价格较低，以及购买天然气车辆相对高VMT（车辆行驶里程）的应用程序，如拖拉机拖车。

  HDVs英里，每年旅游总人数增长了82％，在参考的情况下，从2011年438亿英里，在2040年的240亿英里，年均增长2.1％。HDVs GVWR与大于26,000磅（主要是拖拉机挂车），占HDVs在2040年卡车VMT和91％的天然气消费量的大约四分之三。VMT上升的支持，在预测期内的经济产出上升和道路上的卡车数量增加，从2011年的9.0万至13.7万美元，在2040年。

  Heavy Duty Vehicles lead the growth - average annual growth rate of 14.6 percent

  Natural gas, as compressed natural gas (CNG) and liquefied natural gas (LNG), is the fastest-growing fuel in the transportation sector in the USA, reports the U.S. Energy Information Administration (EIA). The agency projects an average annual growth rate of 11.9 percent from 2011 to 2040.

  Heavy Duty vehicles (HDVs) — which include tractor trailers, vocational vehicles, buses, and heavy-duty pickups and vans with a gross vehicle weight rating (GVWR) of 10,001 pounds or more — lead the growth in natural gas demand throughout the projection period. Natural gas fuel consumption by HDVs increases from almost zero in 2011 to more than 1 quadrillion Btu in 2040, at an average annual growth rate of 14.6 percent.

  Although HDVs fueled by natural gas have significant incremental costs in comparison with their diesel-powered counterparts, the increase in natural gas consumption for HDVs is spurred by low prices of natural gas compared with diesel fuel, as well as purchases of natural gas vehicles for relatively high-VMT (vehicle miles traveled) applications, such as tractor trailers.

  The total number of miles traveled annually by HDVs grows by 82 percent in the Reference case, from 240 billion miles in 2011 to 438 billion miles in 2040, for an average annual increase of 2.1 percent. HDVs, those with a GVWR greater than 26,000 pounds (primarily tractor trailers), account for about three-fourths of truck VMT and 91 percent of natural gas consumption by all HDVs in 2040. The rise in VMT is supported by rising economic output over the projection period and an increase in the number of trucks on the road, from 9.0 million in 2011 to 13.7 million in 2040.