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One
of the great urban legends is that one mile in every five of U.S.
interstate highways is completely straight. The myth goes that under the
Eisenhower Interstate Highway System, these straight stretches of road
would be used as improvised airstrips in times of crisis or times of
war. This is a definite myth, but it has certainly inspired air forces
in other nations to employ the concept.
Air
bases are among the most vulnerable targets in war, and depending on
how close you are to international rivals, the prospect of losing an air
base to a military strike is a very real possibility. As such, an
airstrip baked into the design of a highway is a must.
These
were first built late in WWII by Nazi Germany. Following the war, they
were also built in many places in Europe during the Cold War. These were
built in East Germany and West Germany, Sweden, Switzerland, Poland and
Czechoslovakia.
Other
nations that use highway airstrips as part of their strategy include
North Korea, Taiwan, Singapore and the former USSR. Here is a clip from
the Polish film Na Niebie i Na Ziemii (In the Sky & on the Ground), where Polish Mig-21s use a highway landing strip for operations:
The
key hallmarks of many runway strips are medians that are not grass, but
cement, and minimal space between the two traffic directions. The space
is typically split by jersey barriers (the Russians probably do not
call them that), which can be quickly removed, creating one large
landing zone out of the two traffic lanes.
Despite
the fact that many stretches of highway in the United States look long
enough to land a plane on (and sometimes a plane will land on one in an
emergency), it is not part of the U.S. highway plan, but is certainly
part of the strategy in other nations
source:yahoo
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