[OSM-talk] Highway=trunk : harmonization between countries ?

djakk djakk djakk.djakk at gmail.com
Fri Feb 23 20:41:28 UTC 2018


I would tag the amount of traffic (official count or estimation) + the
width of the lanes (bidirectional with no hard shoulder ?) + an
appropriated renderer to show heavy traffic + narrow road with a thin red
stroke.


Le ven. 23 févr. 2018 à 21:28, Mark Wagner <mark+osm at carnildo.com> a écrit :

> On Thu, 15 Feb 2018 16:14:42 -0200
> Fernando Trebien <fernando.trebien at gmail.com> wrote:
>
> > Landing on this discussion several months late. I've just heard of it
> > by reading a wiki talk page [1].
> >
> > Since 13 February 2009, the wiki [2] criticises highway classification
> > as problematic/unverifiable. This has also been subject to a lot of
> > controversy (and edit wars) in my local community (Brazil), especially
> > regarding the effect of (lack of) pavement.
> >
> > In trying to achieve greater consensus some years ago, I decided to
> > seek opinions elsewhere and finally I arrived at this scheme [3] which
> > I think is very useful, if not perfect yet. It can be easily
> > summarised like this:
> > - trunk: best routes between large/important cities
> > - primary: best routes between cities and above
> > - secondary: best routes between towns/suburbs and above
> > - tertiary: best routes between villages/neighbourhoods and above
> > - unclassified: best routes between other place=* and above
>
> "Best" and "large/important" are both rather subjective.  Further, this
> proposed system gives rather questionable results at times.
>
> For example, the fastest route between the cities of Fargo (largest city
> in North Dakota, population 120,000) and Rapid City (second-largest
> city in South Dakota, population 68,000) follows I-29 and I-90, while
> the shortest follows I-94 for a ways, then cuts cross-country on a mix
> of minor state highways to save 70 miles while taking about five minutes
> longer (on a total trip time of 470 minutes).
>
> Which one is the "best"?  If it's the fast route, there's no issue:
> both roads are already "highway=motorway".
>
> If it's the short route, how should it be classified?  Fargo and Rapid
> City are both larger than any city within 200 miles, which would
> seem to make them "large/important", but even by western American
> standards, they're pretty small in an absolute sense.  Trunk, primary,
> or secondary?
>
> --
> Mark
>
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