[Tagging] Zone 30 (maxspeed)

[Richard Mann]

The fashion in the UK is now to impose 20mph speed limits on each and
every street, rather than create zones with entries/exits. It amounts
to much the same thing in the end, but it means that we simply put:

maxspeed=20 mph+maxspeed:note=Oxford 20 mph zone

(the whole city is a 20mph zone except for a handful of main roads
outside the centre)

I'm not really clear what is the value of tagging a "zone", except in
a note. Why not just use the standard maxspeed tag?

Richard

On Tue, Jul 6, 2010 at 5:32 PM, Sebastian Klein <bastikln at googlemail.com> wrote:
> Hi,
>
> there seems to be some inconsistency, how to tag a traffic zone with
> maximum speed limited to 30 km/h (German "Tempo-30-Zone"). [1]
>
> Tagwatch has the following tags for Europe (with maxspeed=30): [2]
>
> usages tag
> ------ ---
> 944    zone:maxspeed=DE:30
> 631    zone:traffic=DE:30
> 516    source:maxspeed=traffic_zone
> 433    source:maxspeed=DE:zone30
> 152    zone:speed=30
> 140    maxspeed:zone=yes
>  40    source:maxspeed=zone30
>
> People have been very creative because there is no proposal or
> definite suggestion on the wiki. The only one that is remotely
> documented is the first from the list. [3]
>
> Lets pick one and add it as tagging suggestion to the wiki pages
> "Key:source:maxspeed" and "DE:Road_Signs"! [4,5]
>
> So which one to choose? Certainly there is no reason to have more than
> one tag for this.
> On the one hand, the single most important reason to tag this, is to
> have a source for the maxspeed value. This would suggest to use the
> 3rd or 4th.
>
> On the other hand, the direct approach would be to tag what is
> actually there (the traffic zone) and have source:maxspeed implied.
> There could also be some legal implications, although for Germany, I
> don't know anything relevant.
>
> [1] http://fr.wikipedia.org/wiki/Zone_30
> [2] http://tagwatch.stoecker.eu/Europe/En/tagstats_maxspeed_30.html
> [3] <http://wiki.openstreetmap.org/wiki/Proposed_features/trafficzone#Zones_which_does_not_need_tagging>
> [4] http://wiki.openstreetmap.org/wiki/Key:source:maxspeed
> [5] http://wiki.openstreetmap.org/wiki/DE:Road_Signs
>
>
> --
> Sebastian
>
> _______________________________________________
> Tagging mailing list
> Tagging at openstreetmap.org
> http://lists.openstreetmap.org/listinfo/tagging
>