U.S. Department of Transportation
Federal Highway Administration
1200 New Jersey Avenue, SE
Washington, DC 20590
202-366-4000
Contributions and Crossroads
| 1600s and 1700s | Boston Post Road, PDF 1,221 KB |
| 1811-1834, 1926 | National Road/Route 40, PDF 2,005 KB |
| 1920s-1930s, 1938 | Route 66, PDF 2,630 KB |
| 1932 | Mount Vernon and George Washington Memorial Parkways, PDF 637 KB |
| 1933 | Going-to-the-Sun Road, PDF 1,642 KB |
| 1933-1940s, 1966, 1987 | Blue Ridge Parkway, PDF 1,524 KB |
| 1937 | Golden Gate Bridge, PDF 663 KB |
| 1940 | Pennsylvania Turnpike, PDF 818 KB |
| 1942, 1943 | Alaska Highway, PDF 367 KB |
| 1958, 2017 | Golden Corridor: Interstate 90, Jane Addams Memorial Tollway, PDF 1,050 KB |
| 1973, 1979, 1992 | Interstate 70, Colorado: Eisenhower/Johnson Memorial Tunnels and Glenwood Canyon, PDF 680 KB |
| 1990 | Interstate 10, Arizona: Papago Freeway Tunnel, PDF 1,863 KB |
| 2006, 2011 | Interstate 10, Louisiana: Twin Span Bridge, New Orleans, PDF 945 KB |
| 2017 | Interstate 44, Missouri: Park Over the Highway (CityArchRiver), PDF 509 KB |
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