Built ca. 1950
Big Blue River US 77 Bridge (Marshall County, Kansas)Built ca. 1950
Pony truss bridge over Big Blue River on US 77
Open to traffic
McCallie Tunnels (Hamilton County, Tennessee)Built ca. 1950, specifically to handle tourist traffic on U.S. 11 & 64
Tunnels under Missionary Ridge on U.S. 11 & 64
Open to traffic