NC: US-321 missing interchanges

[rickmastfan67]

Discovered quite a few missing interchanges along it's freeway section(s):
Exit 11 (Grier Beam Blvd)
Exit 41 (River Road)
Falls Ave (between US321Alt_S & SouBlvd)

On a side note, I think we can safely convert the 'freeway' section of US-321 to exit numbers (between 'US321BusLin_S' #12 & 'US70/321BusLin' #44).  Would clean up some of the messy labels for "US321BusLin" that aren't really accurate due to the Business file using a different name.

And if the US-321 exit numbers are added, on the "US321BusCon" file we could convert the middle route references for the mainline on it.
US321_A -> US321(20)
US321_B -> US321(28)

[mapmikey]

all these changes made plus another interchange in Lenoir that was not on there...

in the queue and marking as solved

[rickmastfan67]

plus another interchange in Lenoir that was not on there...

Yeah, I missed that one since it wasn't shown on OSM.  Maybe I'll add it tonight if I feel like it.

On a side note, 'US321Alt_N' needs a recenter do to an intersection reconfiguration.