[Tagging] maxspeed:type vs source:maxspeed // StreetComplete
djakk.djakk at gmail.com
Wed Sep 19 19:45:43 UTC 2018
An other example :
abutter=residential and highway:legal_type=rural
Le mer. 19 sept. 2018 à 21:41, djakk djakk <djakk.djakk at gmail.com> a écrit :
> 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 :
> There should be 2 tags : abutters=rural and highway:legal_type=built_up
> 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?:
>> 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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