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Old Posted Aug 28, 2012, 6:35 PM
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Cirrus Cirrus is offline
cities|transit|croissants
 
Join Date: Jul 2001
Location: Washington, DC
Posts: 18,324
Biggest in the DC area is the Springfield Interchange, which includes both of these. It's 24 lanes in the space between them. The construction you see is the addition of HOT lanes to the Beltway, which will add even more ramps to the left one.

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