added I-26 and Dorchester Rd interchange, added missing section of Dorchester Rd (SC 642)
added missing ramps and tags to I-27 exits 217 and 218
added i-26/Montague Ave ramp tags and added missing ramps
added I-26/SC-7 interchange ref and junction tags per US highway wiki
added i26/I526 interchange tags
corrected US401 NE2 classification error, changed back to primary, added ref tags
corrected my US 501 ref tag typo, from US 401
tagged I-26 interchange 211 per wiki, added and tagged interchange 212A
corrected; Burley Dr (OSM id 12375352) contains zero length arc
corrected; Partain Rd (OSM id 12491855) contains zero length arc, traced roads to imagery
fixed; road Big Mountain (OSM id 16633210) contains zero length arc
corrected; road Home Ln (OSM id 16630021) contains zero length arc
corrected; road Stone Cliff Ln (OSM id 16633722) contains zero length arc
corrected; road Highway 81 N (OSM id 12103517) contains zero length arc
corrected; road Meadow Hills Dr (OSM id 12102880) contains zero length arc
corrected; road Soren Ln (OSM id 12102535) contains zero length arc
tagged I-26 exit ramps per US highway wiki
repaired I-26 junction tags per US highway wiki
reviewed roads, added surface tags, traced to GPS near Leesville, sc