john smith opined

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.

The interstates were in part to be emergency Air Force runways, just in case the
local Air Force Base was nuked.

And every(most?) overpass was to have a fall out shelter, with food, built into
it.




-ash
Cthulhu in 2005!
Why wait for nature?