Federal Highway Administration, America's Highways 1776–1976: A History of the Federal-Aid Program (1977)
“ As an integral part of the location study process, the State highway department, in consultation with the FHWA Division Engineer, must first determine whether the highway project will be a major action requiring an evaluation of its potential environmental impact. For those projects found to be major under established criteria, a study will be conducted to see if the environmental impact is significant, If it is determined that a significant impact may occur, then a draft environmental impact statement (EIS) is prepared prior to corridor public hearings. ”
