[Talk-us] Long-distance scenic roads

[Nathan Edgars II]

In the US there are two long federally-maintained roads, the Blue Ridge 
Parkway and Natchez Trace Parkway, that were built for the sole purpose 
of sightseeing. Since they are surrounded by a narrow strip of parkland, 
access is only allowed at certain points, so they are technically 
expressways (normally trunk in the US). On the other hand, they are not 
intended in any way for utilitarian travel, and functionally fit 
approximately as secondary or tertiary.

Tagging is thus inconsistent. It looks like the BRP was recently all 
changed to secondary, but the NTP has portions of residential (obvious 
BS) and primary. I'm pretty sure I've also seen trunk and tertiary used 
in the past.

Does anyone have an opinion on how these should be handled?