[Tagging] WG: when should highway=centreline be used?
GPetermann_muenchen at hotmail.com
Wed Oct 28 07:58:51 UTC 2015
oops, forgot to cc the list...
Von: Gerd Petermann
Gesendet: Mittwoch, 28. Oktober 2015 07:42
An: André Pirard
Betreff: AW: [Tagging] when should highway=centreline be used?
I think you shoulld also look at
Key:road_marking - OpenStreetMap Wiki
Unlike similar keys (e.g. Key:turn) which annotate highway ways, road_marking ways describe the markings themselves. This level of detail is experimental, and has ...
Von: André Pirard <a.pirard.papou at gmail.com>
Gesendet: Dienstag, 27. Oktober 2015 22:01
An: Tag discussion, strategy and related tools
Cc: Gerd Petermann
Betreff: Re: [Tagging] when should highway=centreline be used?
On 2015-10-27 08:50, Gerd Petermann wrote :
we have 153 ways tagged
The wiki describes that as the white stripes in the middle of a road.
I looked at some ways tagged like that and they all seem to
be barriers between large roads (motorway,trunk), e.g.
is also tagged type=oneway. No idea what that would mean.
My understanding so far:
The tag makes no sense, editors use it instead of barrier=hedge
or something similar.
In Germany we have a traffic_sign that warns drivers when
the white line is missing, e.g. because the road was recently repaired.
I think if one wants to map this, it should be an attribute for the existing
highway, not a new way. I think the tag centreline=* is used for that (130 times).
OSM will always surprise me.
Here in Belgium, what is called the "white line" is of uttermost importance.
And I suppose in most other countries too.
I've been looking for it in vain in the wiki and now it surges.
But, first of all, we must distinguish a striped line, as said above, and a continuous white line.
What I say relates to the continuous line. That line means:
* that overtaking is forbidden
* that turning left is forbidden (for right side driving)
* and of course also that U-turn is forbidden
* but also that turning left is forbidden when coming from a crossing
Hence, it may replace many complicated turn restrictions very simply.
And instead of "replace", I should say "add" because they're often missing.
(because making relations is difficult)
For a simple 2-lane road, it would best be a tag of the highway, not an additional line.
The downside is that it would produce many splits.
The most surprising is that it seems to be a one man's tagging assimilated to a hedge !!!
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