49 C.F.R. § 1.31
The Assistant Secretary for Transportation Policy provides policy advice to the Secretary, the Deputy Secretary, and the Under Secretary. The Office of the Assistant Secretary for Transportation Policy is responsible for: Public policy development, coordination, and evaluation for all aspects of transportation, except in the areas of aviation and international affairs, with the goal of making the Nation's transportation resources function as an integrated national system; evaluation of private transportation sector operating and economic issues; evaluation of public transportation sector operating and economic issues; regulatory and legislative initiatives and review; energy, environmental, disability, and safety policy and program development and review; and transportation infrastructure assessment and review. For delegations to the Assistant Secretary for Transportation Policy, see § 1.25a(a) .
49 C.F.R. §1.31