Interstate 71 north of Cincinnati, between the 41 and 44 mile markers.
Two parallel 15,000 runways.
They are repaving this stretch. The old pavement was 12 inches of
concrete with 6 inches of asphalt overlay.
Wright-Patterson Air Force Base, the Springfield ANG and Rickenbacker
ANG bases are within 30-40 miles of this site.

A Guy Called Tyketto wrote:
Interstate highways, are a different story. There is supposed
to be some law on the books from either Eisenhower's or Truman's
Presidency (perhaps revised later) when the Interstate system was
created. Every x amount of miles, the interstate must be in a straight
line (no turns), with no bridges OVER it, in case planes need to land
in emergency. I remember vaguely reading about this at the FBO at KVGT,
but can't remember which law mandated this.