[Tagging] Dispute prevention: meaning of lanes tag
imagic.osm at gmail.com
Thu Apr 19 12:38:41 BST 2012
I'm planning to improve the articles (english, german and russian) for
the lanes-tag (http://wiki.openstreetmap.org/wiki/Key:lanes). Right
now a few points are left open and desperately need some
clarification. As some of the latest changes lead to some dispute (see
) I will let you know what I would like to add/update.
* The lanes tag should count all lanes which are wide enough for
motorized vehicles other than motor cycles (see ). This is (more
or less) the way as it is written in the english and russian article,
but not e.g. in the german. I will add also a link to the UN Vienna
Convention and try to think of an easier understandable wording
compared to the official text.
* PSV lanes SHOULD be included (also ). Example: lanes=3 and
lanes:psv=1 means we have three lanes and one OF THEM is for PSV only.
* Cycle lanes should NOT be included (see ), because they are not
"wide enough for one moving line of motor vehicles other than motor
* Parking lanes/spaces should NOT be included (see ).
* Turn lanes SHOULD be included (see  and ).
* The lane count should change, as soon as a) new lane has reached its
full width or b) a lane starts to disappear (usually a merge with
another lane) (also ).
* Partly taken from the current german page I would add the following
assumptions for roads without explicit lane count:
- A one-way road has one lane
- Two-way roads have two lanes, one in each direction
- Two-way roads with a specified lane count, but without a specified
lanes:forward OR lanes:backward and a lane count, that is divisible by
two, are assumed to have half of the lanes in each direction, e.g.
lanes=4 means two lanes in each direction if not specified otherwise.
I will add a recommendation for this situation, to add explicit
I'm not sure what I should do with the comments about sidewalks. They
don't have anything to do with lanes (neither motorized traffic, psv,
cycle lanes, whatever), so they actually don't belong here. Maybe just
a link in Related Tags?
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