I was using the VTrans PDFs as outlined on the FC page: https://wiki.waze.com/wiki/FC-USA. I haven’t checked the two GIS sites recently to see if they have added FC layers.
I managed to unearth a 2005 FC Shapefile on the VTrans site. I uploaded it to the VCGI Interactive map, and it worked! I’m using it to confirm street names for the smaller “roads” that are on the FC pdf map.
I don’t trust it over the 2014 pdf map, but so far I haven’t found any differences between the two.