1917-1952 changes were indicated as they occurred in color coding on 200 plan size folded maps on file at Dept.'s Design Section.

The 1990 Department of Transportation and Related Agencies Appropriation Act directed the Department of Transportation to prepare a report with the following objectives: update for the use of Congress a nationwide inventory of existing scenic byways; develop guidelines for the establishment of a National Scenic Byways Program, including recommended techniques for maintaining and enhancing the scenic, recreational, and historic qualities associated with each byway; conduct case studies of the economic impact of scenic byways on travel and tourism; and analyze potential safety consequences and environmental impacts associated with scenic byway designation. To respond directly to the first objective, the Federal Highway Administration developed a questionnaire in May 1990, to obtain information on Scenic Byways and byways programs. This report summarizes all four parts of the questionnaire.

"In April 1962, Executive Order 11017 and subsequent amendments, established the Recreation Advisory Council comprised of the Secretaries of the Interior, Agriculture, Defense, Commerce, Health, Education and Welfare. the Administrator of the Housing and Home Finance Agency, and the Chairman of the Tennessee Valley Authority. The council was commissioned, among other things, to provide broad policy advice on all important matters affecting outdoor recreation resources and to facilitate coordinated efforts among the various Federal agencies. In 1964, the Council issued a policy statement (Circular No. 4) recommending that a national program of scenic roads and parkways be developed. In this policy circular, the Council identified certain elements to be considered in a comprehensive study of such a program and commissioned the Department of Commerce to conduct it."--