To establish a unified transportation assistance program : hearings before the Subcommittee on Transportation of the Committee on Public Works, House of Representatives, Ninety-third Congress, second session, on H.R. 12859, to amend Title 23, United States Code, the Federal-Aid Highway Act of 1973, and other related provisions of law, to establish a unified transportation program, and for other purposes, March 19, 20, 21, 26, 27; April 2, 3, 4, 9, 10, and 11, 1974.