Quadrennial Energy Review: Energy Transmission, Storage, and Distribution Infrastructure [open pdf - 33MB]
From the section 'Summary for Policymakers': "The U.S. energy landscape is changing. The United States has become the world's leading producer of oil and natural gas combined. The country is less dependent on foreign oil, as a percentage of national oil consumption, than it has been since 1971. Current cars can go farther on a gallon of gas than ever before. Between 2005 and 2014, U.S. consumption of motor gasoline fell 2.6 percent despite population growth of 7.6 percent and gross domestic product growth of 13.0 percent. Additionally, as a result of changes in economic structure and conditions and policies to promote energy efficiency, U.S. electricity consumption was flat over that 10-year period and total energy use declined by 1.9 percent. […] This first installment of the QER [Quadrennial Energy Review] addresses infrastructures for energy transmission, storage, and distribution (TS&D), broadly defined as infrastructures that link energy supplies, carriers, or by-products to intermediate and end users. This focus was chosen because the dramatic changes in the U.S. energy landscape have significant implications for TS&D infrastructure needs and choices. Well-informed and forward-looking decisions that lead to a more robust and resilient infrastructure can enable substantial new economic, consumer service, climate protection, and system reliability benefits. Good decisions on TS&D infrastructure can also provide flexibility in taking advantage of new opportunities to achieve our national energy objectives."
United States. Department of Energy: http://www.energy.gov/