[Tagging] WG: when should highway=centreline be used?

Gerd Petermann 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 ...
Weitere Informationen...<http://wiki.openstreetmap.org/wiki/Key:road_marking>


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 :

Hi all,

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.


This way


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 !!!



-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tagging/attachments/20151028/22e5056c/attachment.html>

More information about the Tagging mailing list