[Talk-GB] barrier=kerb on highways may be blocking OSRM (Car) routing

[Edward Catmur]

Good idea - I've added a pull request to Osmose
https://github.com/osm-fr/osmose-backend/pull/714 - please take a look and
weigh in if you think it could be improved.

On Wed, Dec 18, 2019 at 4:47 PM Ken Kilfedder <spiregrain_osm at ksglp.org.uk>
wrote:

> Is it worth adding this to Osmose and the other QA tools?
>
> ---
> https://hdyc.neis-one.org/?spiregrain
> spiregrain_osm at ksglp.org.uk
>
>
> On Wed, 18 Dec 2019, at 4:31 PM, Edward Catmur via Talk-GB wrote:
>
> Further to this - if you want to look for barrier=kerb + highway=crossing
> nodes in your area, which may be disrupting routing, the Overpass query
> is node["barrier"="kerb"]["highway"="crossing"] :
> https://overpass-turbo.eu/s/P5Y
>
> On Wed, Dec 18, 2019 at 4:20 PM Edward Catmur <ecatmur at googlemail.com>
> wrote:
>
> Returning to the original issue, I think I've worked out what the problem
> is. It's that on a crossing node, kerb=* is fine (it describes the
> presence/attributes of the kerb on the subsidiary highway) but barrier=kerb
> should *not* be used.
>
> Combining kerb=* with highway=crossing is blessed by Wiki:
>
>  If the kerb is identical on both sides of a crossing, it is possible to
> add the kerb=* tag to the highway
> <https://wiki.openstreetmap.org/wiki/Key:highway>=crossing
> <https://wiki.openstreetmap.org/wiki/Tag:highway%3Dcrossing> node, which
> sacrifices accuracy for simplicity, consider using kerb:left and kerb:right
> if the kerbs differ.
>
>
> but this doesn't say that barrier=kerb should be included on the crossing
> node!
>
> I think barrier=kerb + highway=crossing should be regarded as a mistake.
> Taginfo shows ~ 1000 of them (0.47 of barrier=kerb nodes; 0.03% of
> highway=crossing nodes) which should fixable.
>
> On Wed, Dec 18, 2019 at 3:37 PM Philip Barnes <phil at trigpoint.me.uk>
> wrote:
>
> On Wednesday, 18 December 2019, David Woolley wrote:
> > On 18/12/2019 13:31, Edward Catmur via Talk-GB wrote:
> > > That said, the same goes for cars - other than the lowest bodied
> sports
> > > cars, pretty much all motor vehicles are capable of taking a kerb at
> low
> > > speed.
> >
> > Although raised kerbs are generally there to stop that happening and the
> > resultant trespass on the footway can be illegal, e.g. in London.  As
> > such routers should not be routing motor vehicles over kerbs.
>
> Its a level of detail that few of us have mapped, but it is perfectly
> acceptable, and quite common, to route motor vehicles  over lowered kerbs
> to access private property.
>
> Phil (trigpoint)
>
>
>
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