Add-on aerodynamic devices (cab-roof fairings, side extenders, side skirts, boat-tails and others) for heavy-duty trailers and tractors provide the potential of fuel savings, cost savings, and the reduction of greenhouse gas (GHG) emissions. The goal of this work was to evaluate potential for aerodynamic devices to provide GHG emission reductions for four trailer types: flatbed, tanker, curtainside, and container chassis. This work included an analysis of a United States (U.S.) national trailer registration database with 253,191 total trailers and a trailer activity survey of 51 fleets. Flatbed, container chassis, and tanker trailers were relatively extensively used, with 48% and 64% of fleets indicating annual vehicle miles traveled (VMT) per trailer of greater than 50,000 and 25,000 miles, respectively. Annual savings based on a 50% and 100% market penetration for the registration database in the U.S. were estimated to be approximately 37.0 to 74.1 million gallons diesel, and $92.6 to $185.1 million in fuel (~U.S.$731 per tractor-trailer), and ~0.38 to 0.76 million metric tons (MMT) CO_2eq.

用于重型拖车和拖拉机的附加空气动力学装置（顶棚整流罩，侧延长器，侧裙，船尾等）可提供节省燃料，节省成本和减少温室气体（GHG）排放的潜力。这项工作的目的是评估空气动力学设备的潜力，以减少以下四种拖车类型的温室气体排放：平板，油轮，侧帘和集装箱底盘。这项工作包括对美国国家拖车注册数据库的分析，该数据库共有253,191辆拖车，并对51个车队进行了拖车活动调查。平板，集装箱底盘和油轮拖车的使用相对广泛，其中48％和64％的车队表示每个拖车的年行驶里程（VMT）分别大于50,000和25,000英里。_当量。