Airport

Lindbergh Tunnel (St. Louis County, Missouri)
Built in 2006
Tunnel on North Lindbergh Boulevard (U. S. Highway 67) under the west runway at Lambert - St. Louis International Airport
Open to traffic

O'Hare Aircraft Overpass (Cook County, Illinois)
Built 1966
Bridge over I-190 on Runway
Open to airplane traffic

Taxiway A Tunnel (Allegheny County, Pennsylvania)
Tunnel under Taxiway A on Union Railroad & Lebanon Road/PA 885
Open to traffic