I've made it through the 10XXs and found a few others that are unsigned:
1001*
1018
1052
1074*
1082*
1085
Those marked * are shown on KYTC county maps but GMSV does not show any signs. KY1001 has a 0 mile marker at its intersection with KY80, but that's the only evidence that it exists (no GMSV coverage on the route itself).
A few others have minor problems (waypoints slightly off center or in need of renaming):
1004 (rename waypoint, move CroCreRd)
1043 (rename waypoint(s))
1044 (rename waypoint(s))
1049 (rename waypoint(s))
1050 (rename waypoint(s))
1053 (rename waypoint(s))
1054 (move KY330_S)
1055 (rename waypoint(s))
1064 (rename waypoint(s))
1071 (rename waypoint(s))
1075 (move ends slightly)
1083 (rename waypoint(s))
1087 (rename waypoint(s))
1088 (rename waypoint(s))
1089 (rename waypoint(s))
1096 (move BigCrkRd slightly)
1098 (rename waypoint(s))
Tim evidently was using OSM data for waypoint names, but it seems to me that KYTC names would be more appropriate. Is there any precedent?
Others need additional waypoints:
1027 (KY756)
1057 (KY2001)
Finally these need more significant work:
1020 has very spotty signage throughout urban Louisville, but KYTC's route is close to what we have. Also, KYTC shows part of it along a one-way pair, so waypoints need to be re-centered.
1081 definitely ends at KY40 per both GMSV and KYTC.
KY 1051: Should KY448 point be aligned on the KY 448 mainline (and the corresponding point in that route?)
KY 1054: reposition KY330_S?
KY 1059: Google and Yahoo show the route continuing to KY 32, but expect you looked into this when plotting
KY 1070: Would the road name be an acceptable alternative to "End"?
KY 1072: Point at Montague Rd for travelers who might be on this only to access the park?
I think 1051 is probably ok as-is (the "mainline" intersection is more of a ramp now), but agree on 1054, and could be swayed on 1059 (it seems to end at KY32 according to GMSV but KYTC agrees with what we currently have). It looks like KY1070 isn't also named Howell Rd, so I can change End to HowRd; looks like I ought to do the same with KY1094. I can add a waypoint for 1072 at the park entrance.
I'll make the edits and submit the pull request sometime this weekend.