23 U.S.C. § 128

Any State transportation department which submits plans for a Federal-aid highway project involving the by passing of or, going through any city, town, or village, either incorporated or unincorporated, shall certify to the Secretary that it has had public hearings, or has afforded the opportunity for such hearings, and has considered the economic and social effects of such a location, its impact on the environment, and its consistency with the goals and objectives of such urban planning as has been promulgated by the community. Any State transportation department which submits plans for an Interstate System project shall certify to the Secretary that it has had public hearings at a convenient location, or has afforded the opportunity for such hearings for the purpose of enabling persons in rural areas through or contiguous to whose property the highway will pass to express any objections they may have to the proposed locations of such highway. Such certification shall be accompanied by a report which indicates the consideration given to the economic, social, environmental and other effects of the plan or highway location or design and various alternatives which were raised during the hearing or which were otherwise considered.

When hearings have been held under subsection (a), the State transportation department shall submit a copy of the transcript of said hearings to the Secretary, together with the certification and report.