[Talk-us] highway=trunk for NHS routes?

Volker Schmidt voschix at gmail.com
Fri Dec 30 21:55:37 UTC 2016

> As a general rule, should highway=trunk be used for routes on the National
> Highway System? Considering that those routes are generally more backbone
> routes, more important than a lot of primary routes, it makes sense that
> they should be tagged with trunk.
> --Roadsguy

The formulation on the wiki page
does not make any reference to the National Highway System, at least so far.
Looking at the NHS Wikipedia page
https://en.wikipedia.org/wiki/National_Highway_System_(United_States) I
would say the answer to the question should probably be "no", as the NHS
roads are defined on certain importance criteria and this assignment seems
to be orthogonal to the road classification system, whereas the OSM tagging
is based on the road attributes, layout and traffic usage classes.
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