Added a connectivity relation and lane data.
"Expressway" in this case does not mean freeway; see http://wiki.openstreetmap.org/wiki/key:expressway
Added change:lanes tagging.
Added turn:lanes data to highways.
Lane tagging and removal of tiger:reviewed=no tags.
More accurate lane tags at the US-15-501/I-40 interchange.
NC classification corrections and small misc cleanup
Added details in North Carolina
osmbug fixes from drive
post-"redaction" cleanup: US 401-501-601-701
hgv=* on some North Carolina highways
National Highway System
lane count for trunks
some work on North Carolina routes
cleanup & review, US 15/501, I 40, Durham NC
Adding or fixing refs for U.S. Highways.
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