The United States Marine Highway Program (USMHP), codified at 46 U.S.C. 55601, was originally established by Section 1121 of the Energy Independence and Security Act of 2007 to reduce landside congestion through the designation of Marine Highway Routes. The USMHP statute authorizes the U.S. Department of Transportation (Department or DOT) to make grants to implement Projects or components of Projects that 1) provide a coordinated and capable alternative to landside transportation; mitigate or relieve landside congestion; promote Marine Highway Transportation; or use vessels documented under 46 U.S.C. chapter 121; and 2) develop, expand, or promote Marine Highway Transportation or shipper use of Marine Highway Transportation.