E:
Energy Information Administration (EIA) - Provides policy-independent data, forecasts, and analyses regarding energy and its interaction with the economy and the environment [U.S. Department of Energy (DOE), U.S. Energy Information Administration (EIA)]

N:
National Transportation Safety Board - The National Transportation Safety Board is an independent U.S. Federal agency that investigates every civil aviation accident in the United States and significant accidents in the other modes of transportation, conducts special investigations and safety studies, and issues safety recommendations to prevent future accidents. [Ad Hoc Organizations, National Transportation Safety Board]

T:
Transportation Energy Consumption Surveys - Vehicle energy supply and consumption surveys compiled by the Energy Information Administration (EIA) [U.S. Department of Energy (DOE), U.S. Energy Information Administration (EIA)]