American Association of State Highway Officials, U.S. Route Numbering Committee (1957)
“ Relocation and Recognition of Business Route Proposed rerouting begins on present route south of Glen Burnie over a recently completed controlled access divided highway into Baltimore utilizing a part of the Baltimore Beltway and the Washington-Baltimore Expressway, then over city streets to junction with U.S. 1 on North Avenue. Present marked U.S. 1 would then become the Business Route. ”
