|
INTERSTATE HIGHWAY SYSTEM -- FACTS AND HISTORY:
Proposals Leading to the Interstate System: Maps (1939-1958) (Bureau of Public Roads, courtesy Sandor Gulyas and Marc Fannin) Interstate Numbering Developments, State by State (American Association of State Highway Transportation Officials, courtesy Stephen Summers) Interstate Highway System History (Public Roads, Federal Highway Administration, 1996) Interstate Highway System Facts (Federal Highway Administration, 1998)
|
|