Re: U.S. Interstate Highways
- Hi Jeff, & Ancient W.
I think on the first "interstate" built, there's a long straight,
and reletively flat section, that interupts every 5 miles or so of
regular highway, throughout most of it's length. The right of way,
and topography is purposely Engineered that way, deliberately, and
at no compromise to expense, it's obvious when you drive it, and
recognise what to look for, these days, however, I suppose very
few pepole do.
I find it usefull, but only on very, very, rare occasions, and
when the roads are deserted, for high speed calibration runs on my
I've seen pictures from Sweeden, with thier Viggens and Grippens,
and specifically being equipped with powerfull thrust revercers,
tires, and braking systems, and also being designed for short
takeoff rolls, (Reletively for conventional aircraft), routinely
practice touch and go landings on pre-cleared public highways.
Another issue of course in that scenario is FOD, recognise that the
the MIG 29, and recent SU series have retractable air filter
baffles and alternative air intakes on the upper wing roots, to
protect the engines.
Something similar, if engineered and implemented would have saved
that ill fated Concorde.
> I wonder if they still maintain that capability or if they've sinceparts
> allowed the trees to grow, built new interchanges, etc. A lot of
> of the system have been rebuilt and they went down to bare dirt andare,
> started over in some areas, not just ground off the top layer and
> repaved it again. I also wonder if the areas intended originally as
> backup runways were rebuilt as such or just as normal roads.
> I'd ask if there's a map showing where some of the backup runways
> but I don't want to get in trouble with Homeland Security. :-)