Interstate 595 was a proposed upgrade to
U.S. Route 1 in the
Crystal City section of
Arlington County, Virginia, between a northern terminus at
Interstate 395 and
State Route 110 and a southern terminus at
Reagan National Airport (
State Route 233). The upgrade as proposed was never built. Instead, US 1 is elevated with a
diamond interchange over 15th Street South, but is a surface road with signaled intersections at 20th Street South and further south.
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