On Mon, 18 Mar 2019 at 11:41, Martin Koppenhoefer
<[email protected]> wrote:
>
> I disagree, cycleway:left=opposite_lane is clearly about a bicycle lane in an
> "opposite" direction, but it remains unclear to what "opposite" refers
> (direction of OSM way or direction you would expect from the jurisdiction),
> and it doesn't make it clear whether this has oneway implications (the wiki
> says so, but the data doesn't support it, see below).
Maybe backward_lane would have been a little clearer, but the meaning
of cycleway=opposite_lane ("a cycling lane going in the opposite
direction to normal traffic flow") is clearly defined on its tag page
[1].
[1]: https://wiki.openstreetmap.org/wiki/Key:cycleway
> There seems to be more confusion about this tag in the wiki, e.g. here
> https://wiki.openstreetmap.org/wiki/Tag:cycleway:right%3Dlane I read that
> cycleway=opposite_lane is used for locations with 2 bike lanes (trail is to
> mean "lane" on that page?)?
That was obviously wrong and i've corrected it. [2]
[2]:
https://wiki.openstreetmap.org/w/index.php?title=Tag%3Acycleway%3Aright%3Dlane&type=revision&diff=1822549&oldid=1608868
> Looking at actual data it seems more than 10% of the roads with this tag also
> have an explicit oneway=no and roughly one third (!) do not have any oneway
> tag, which directly contradicts the definition.
I've just done some overpass turbo queries and came to completely
different numbers:
cycleway=opposite_lane: 9,210
cycleway=opposite_lane + oneway=yes: 8,645
--> 6% of cycleway=opposite_lane are missing oneway=yes
cycleway:right=opposite_lane: 3,626
cycleway:right=opposite_lane + oneway=yes: 3,414
--> 6% of cycleway:right=opposite_lane are missing oneway=yes
cycleway:left=opposite_lane: 956
cycleway:left=opposite_lane + oneway=yes: 883
--> 8% of cycleway:left=opposite_lane are missing oneway=yes
All cycleway*=opposite_lane: 13,792
All cycleway*=opposite_lane + oneway=yes: 12,942
--> 6% of all cycleway*=opposite_lane are missing oneway=yes
This isn't very good, but i doubt that it gets better with an
additional and cryptic cycleway:left:oneway=-1 tag.
Regards
Markus
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