Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two

Medium and heavy duty vehicles (MHDVs) are a significant contributor to energy consumption and greenhouse gas emissions in the U.S., accounting for approximately 22 percent of U.S. transportation energy consumption. The fuel consumption of MHDVs has only recently begun to be regulated at the federal level.

To provide scientific and technical advice on MHDV efficiency, the Energy Independence and Security Act of 2007 mandated the Secretary of Transportation to sponsor a series of National Academies studies on the technologies and costs for improving fuel efficiency in MHDVs. The studies provide advice and recommendations on establishing fuel economy metrics and standards that are appropriate, cost-effective, and technologically feasible for commercial MHDVs.

Reducing the Fuel Consumption and Greenhouse Gas Emissions of Medium- and Heavy-Duty Vehicles, Phase Two is the final report produced by this study. The first report is available for download here. They are reports produced by two divisions of The National Academies of Sciences, Engineering, and Medicine (NASEM): the Transportation Research Board (TRB) and the Division on Engineering and Physical Sciences (DEPS).

NASEM will conduct a webinar on Tuesday, October 8, 2019 from 1-2PM ET that will discuss the efficiency of medium and heavy duty vehicles (MHDVs). Participants must register in advance of the session.