[Talk-us] September 11th National Memorial Trail is now designated

[Minh Nguyen]

Vào lúc 20:01 2021-10-23, stevea đã viết:
> We do (now, by convention / consensus) tag USBRs with cycle_network=US:US and quasi-nationals with cycle_network=US.  Because 9/11 NMT was declared by federal law (routes in the USBRS aren't, quite, though AASHTO is granted "authority" to do so exactly as it numbers Interstates and US Highways), we might want to tag 9/11 NMT with something like cycle_network=US:USA to indicate it was "passed (unanimously!) by both houses of Congress and signed into law as 'designated' by the President."  This really IS unique in USA national bike routing, as we've never had a "nationally designated" route like this.  I'm open to suggestions.

I agree that the 9/11 Memorial Trail Route shouldn't be tagged 
cycle_network=US:US, as it's distinct from the USBRS, but 
cycle_network=US:USA would be needlessly confusing. A new 
cycle_network=* value becomes necessary when multiple route relations 
belong to the same route network (e.g., similar numbering, markers, 
design criteria), necessitating a mechanism for a data consumer to 
determine that the routes are related (without adding the routes to a 
brittle network relation).

So far, we have no reason to believe the 9/11 Memorial Trail Route will 
become part of a larger network, so it would be reasonable, if 
unsatisfying, to omit the cycle_network=* key. Plenty of one-off road 
routes similarly omit the network=* key. There is precedent for 
cycle_network=US, though the "quasi-national routes" you've identified 
don't form a single coherent network.

To indicate which governmental bodies designated and manage the route, 
consider using more generally applicable keys for this information:

operator=National Park Service
operator:wikidata=Q308439
related_law=PL 117-48

These tags would go one the relation, not the constituent ways. Public 
Law 117-48 designates the route and the NPS "operates" it, but neither 
has to pertain to every component trail or roadway.

-- 
minh at nguyen.cincinnati.oh.us