corrected US 176 name tags and added ref tags
joined US 21 ways at county line and added ref tags
joined US 601 ways at county line and added ref tags
joined US21 ways and added ref tag
removed duplicate motorway_link on I-40 exit ramp
I 95 TIGER fixup, added ref and oneway tags, corrected name tag
added missing ref and oneway tags on I-26 for consistant rounting directions
deleted connections of I77 and links on bridge, should give correct routing
ref tag on bridge from I-77 to I 77
US 11 TIGER fixup, joined ways and added ref tags
US11/US19 joined ways and deleted overlapping segments
more I 81 and US 11 TIGER fixup, added ref tags, oneway tags to links
US 11 and I-81 TIGER fixup, added ref tags
reviewed ways off Bush River Rd, Irmo SC
test of highway=unsurfaced vs highway=unclassified and surface = unpaved