[Tagging] maxspeed:type vs source:maxspeed // StreetComplete

djakk djakk djakk.djakk at gmail.com
Wed Sep 19 19:41:12 UTC 2018


Sound cool but there may be a gap between the reality and the law : example
: it looks like the countryside but legally it is inside the built up area
:
http://www.mapillary.com/map/im/Dybpz_fHGEmWdLjfG7OMvQ/photo
There should be 2 tags : abutters=rural and highway:legal_type=built_up


djakk


Le mer. 19 sept. 2018 à 21:27, Tobias Zwick <osm at westnordost.de> a écrit :

> Okay, so US-American legislation usually differs between "residential
> district" and "business district" for maxspeed defaults, as opposed to
> "built-up area" in most other countries.
>
> Actually, there is a tag to denote that a street is in a residential
> district or business district. It comes from the early days of OSM where
> people were mapping with their GPS trackers for the lack of available
> aerial imagery. What about this?:
>
> abutters=residential
> abutters=commercial
>
> See https://wiki.openstreetmap.org/wiki/Key:abutters
>
> On 19/09/2018 14:08, Greg Troxel wrote:
> > Tod Fitch <tod at fitchdesign.com> writes:
> >
> >>> On Sep 18, 2018, at 6:19 PM, Joseph Eisenberg <
> joseph.eisenberg at gmail.com> wrote:
> >>>
> >>> So on the boundary=administrative admin_level=6 for Rogers County, we
> could have something like maxspeed:type:default=45mph
> >>
> >> Except that more typically there will be different default speed
> >> limits on each of the various OSM highway classifications. So maybe
> >> something more like “maxspeed:default:residential=25 mph”.
> >
> > I am not aware of *unposted* default limits in the US being different by
> > an entity smaller than state.   In Massachusetts, there are default
> > limits in state statutes, in particularly 30 mph in "thickly settled"
> > areas (also defined in statute).  Some towns have adopted 25 mph in
> > thickly settled areas, and they have signs at the town borders.
> >
> > It's an interesting question at what level to tag individual roads and
> > when to have some way of expressing rules and therefore to expect all
> > data consumers to evaluate the rules.  My quick reaction is that
> > publishing rules for regions smaller than states is going to be too
> > messy, vs just tagging the ways.
> >
> > With respect to maxspeed:default:residential, that's totally unworkable
> > in Massachusetts.  The law does not talk about roads or even define them
> > as residential or not.   The question for 30 (vs 40) is whether the road
> > is "thickly settled", which is
> >
> >   built up with structures devoted to business, or the territory
> >   contiguous to any way where the dwelling houses are situated at such
> >   distances as will average less than two hundred feet between them for
> >   a distance of a quarter of a mile or over.
> >
> > So there are many roads that are properly tagged "residential" but are
> > not subject to the lower speed.
> >
> > In Mass, we have speed limit tags on almost all legal roads.  To me,
> > that seems like the most straightforward approach, even if there are
> > also defaults.
> >
> > If the general defaults are intended for routing, that seems more or
> > less ok.  If they are intended to actually provide speed limit guidance
> > to drivers, I'm opposed, at least in jurisdictions where they aren't
> > strictly reliable.
> >
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