[Talk-us] US highway classification
Nathan Mills
nathan at nwacg.net
Sun May 29 04:29:02 BST 2011
On Sat, 28 May 2011 23:00:11 -0400, Anthony wrote:
> Instead of giving me hypothetical if..then answers, can you give me a
> straightforward answer?
You're trying to get an exact answer to something that isn't an exact
science, so no. I'm allowing for the fact that there may be a situation
in which trunk should be applied to a two lane road because not doing so
would misrepresent the area to viewers of the map and routing engines
more than not using it would. I don't have personal experience with
every road in the US, after all. In the cases I've personally seen, I
think the roads could have been adequately described with primary.
Obviously, my preference would be that trunk only be used for roads
with more than two lanes and a barely-existent shoulder, but barring
that I would like it to mean 'very important road that is not a
motorway.'
And yes, as it presently stands, a routing engine would probably be
better off using the two foot shorter primary than the two foot longer
trunk, given that we have a bunch of roads tagged as trunk that are no
more suitable for long distance travel than most roads tagged as
primary.
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