<div dir="auto"><div><div class="gmail_quote"><div dir="ltr" class="gmail_attr">On Wed, May 5, 2021, 9:44 AM Minh Nguyen <<a href="mailto:minh@nguyen.cincinnati.oh.us">minh@nguyen.cincinnati.oh.us</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">NHS is itself a functional road classification scheme, just not one that <br>
maps cleanly to other classification schemes, because it's very <br>
explicitly about funding. The law literally says which streets are part <br>
of the system.<br>
<br>
Tagging the entire NHS, sans Interstates, as highway=trunk would result <br>
in basically every signposted local truck route becoming a trunk road. <br>
(As in MUTCD R14-1, not M4-4.) It wouldn't technically add much <br>
information to the map, because NE2 already went around tagging NHS=* on <br>
the whole system as it was back then.<br>
<br>
It would be more reasonable to tag the Other Principal Arterials class <br>
as highway=trunk, but NHS is not the only scheme that includes an Other <br>
Principal Arterials class. That terminology comes from the FHWA's <br>
Highway Functional Classification system. It's unlikely that Congress <br>
and FHWA agree on every individual principal arterial classification, so <br>
there could still be persistent disagreements about highway=trunk.<br></blockquote></div></div><div dir="auto"><br></div><div dir="auto">I am not suggesting to tag *every* route that is on the NHS as trunk. </div><div dir="auto"><br></div><div dir="auto">To be clear, my proposal is to tag only NHS routes that are on state and US routes. Also, I don't think we should include intermodal connectors either. That will hopefully cut down on the number of NHS routes in urban areas.</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_quote"><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex">Lately there's been a lot of discussion about an Americentric renderer <br>
on OSMUS Slack. [1] It's an idea OSMUS has been kicking around forever, <br>
but the enthusiasm around highway classification and shields may help <br>
make it a reality.<br>
<br>
It would be feasible for an Americentric renderer to apply an orthogonal <br>
rendering style to expressway=yes, but I'm sober about the ability of <br>
such a renderer to resolve highway=trunk disputes on its own. After all, <br>
<a href="http://osm.org" rel="noreferrer noreferrer" target="_blank">osm.org</a>'s openstreetmap-carto style is still the front door for mappers <br>
everywhere. Maybe better editor support could help tip the scales, but <br>
expressway=yes may be a hard sell to globally relevant editors and data <br>
consumers, being so peculiar to the U.S.<br>
<br>
[1] <a href="https://wiki.openstreetmap.org/wiki/United_States/Map_style" rel="noreferrer noreferrer" target="_blank">https://wiki.openstreetmap.org/wiki/United_States/Map_style</a></blockquote></div></div><div dir="auto"><br></div><div dir="auto"><br></div><div dir="auto">That's interesting; it would certainly nice to have a US-centric renderer if only to show route shields, but it would definitely be great to have it render the expressway=yes tag. There would probably be less need to have trunk be representing expressway.</div><div dir="auto"></div></div>