The U.S. Department of Transportation's Research and Innovative Technology Administration John A. Volpe National Transportation Systems Center (Volpe Center) in Cambridge, Massachusetts, prepared this report for the Federal Highway Administration (FHWA) Office of Real Estate Services (HEPR). Carson Poe of the Volpe Center's Transportation Policy and Planning Technical Center led the project team, which consisted of Gina Filosa and Julianne Schwarzer, also of the Transportation Policy and Planning Technical Center; Aviva Brecher of the Environmental and Energy Systems Technical Center; and Katherine Millette of MacroSys. Richard Moeller of O.R. Colan Associates also contributed.