As the 1960s drew to a close, Federal interest in the practices and policies related to urban and suburban development was reaching a crescendo. Waves of new regulations designed to address the growing environmental movement found support in the halls of Congress and the White House, transportation infrastructure funding was bolstered to ensure completion of the Interstate Highway System and to help plan and build new mass transit systems, and laws to address social and economic inequality were enacted. Scholarship addressing this period is extensive, but research focusing specifically on the events behind the expansion of environmental and transportation policy and infrastructure is small. For a critique of the lack of attention by historians to environmental policy, see Ted Steinberg, ‘‘Down to Earth: Nature, Agency, and Power in History,’’ The American Historical Review 107, no. 3 (2002). For a few examples of existing work in the subfield of U.S. environmental history, see Samuel Hays, Beauty, Health, and Permanence: Environmental Politics in the United States, 1955-1985 (Cambridge: Cambridge University, 1986); Samuel Hays, A History of Environmental Politics Since 1945 (Pittsburgh, PA: University of Pittsburgh Press, 2000); Adam Rome, The Bulldozer in the Countryside: Suburban Sprawl and the Rise of American Environmentalism (Cambridge: Cambridge University Press, 2001); Hal Rothman, The Greening of a Nation? Environmentalism in the United States Since 1945 (Orlando, FL: Harcourt Brace, 1998). For greater detail on the Congressional history of water pollution legislation, see Paul Milazzo, Unlikely Environmentalists: Congress and Clean Water, 1945-1972 (Lawrence, KS: University Press of Kansas, 2006). For interpretation and explanation of different aspects of federal air quality regulations post-1945 as they relate to planning and development, see David Currie, ‘‘The Mobile-Source Provisions of the Clean Air Act,’’ The University of Chicago Law Review 46, no. 4 (1979); Michael Kraft, Environmental Policy and Politics (New York: Longman Press, 2001), Ch. 2; R. Shep Melnick, Regulation and the Courts: the Case of the Clean Air Act (Washington, DC: Brookings Institution, 1983), Ch. 2; Brian Stone, ‘‘Air Quality by Design: Harnessing the Clean Air Act to Manage Metropolitan Growth,’’ Journal of Planning Education and Research 23, no. 2 (2003). Details about the history of transportation policy (and its affects on the built environment) have been more widely reported. Example works include, Owen Gutfreund, Twentieth Century Sprawl: Highways and the Reshaping of the American Landscape (New York: Oxford University, 2004); Kenneth Jackson, Crabgrass Frontier: the Suburbanization of the United States (New York: Oxford University Press, 1985), Ch. 2, 9, 14; Tom Lewis, Divided Highways: Building the Interstate Highways, Transforming American Life (New York: Viking, 1997); Clay McShane, Down the Asphalt Path: The Automobile and the American City (New York: Columbia University, 1997); Bruce Seely, Building the American Highway System: Engineers and Policy Makers (Philadelphia: Temple University, 1987); Edward Weiner, Urban Transportation Planning in the United States: An Historical Overview (Washington, DC: Greenwood Publishing, 1999).