I noticed this system was upgraded to preview again. I was looking at the Great River Road in Louisiana and had some questions. Is this system joining US Interstates as a system where we include routes regardless of signage? I'm having trouble finding signs for GRRbat. I had never paid attention to this road, so I don't recall whether I've seen signs in person or not.
Also, how was the routing chosen for this route through Baton Rouge? It doesn't seem to be signed, and the path doesn't match the route as defined in Louisiana statute, specifically the section between I-10 and I-110. Was another source used besides the statutory routing?