fractional routes are treated as overlaps #18
Description
ref=CR 73/12: http://otile1.mqcdn.com/tiles/1.0.0/osm/18/72976/99568.png
example sign: http://www.flickr.com/photos/andrew-turnbull/5904974507/ (yes, WV uses circles for county routes (actually maintained by the state, but called county routes), and squares for (primary) state routes)
