[Tagging] Usefulness of bicycle=dismount on ways

Georg Feddern osm at bavarianmallet.de
Wed Oct 16 08:10:50 UTC 2013


Am 16.10.2013 09:23, schrieb Volker Schmidt:
> (this thread is so long now, that I  don't remember if I have inserted 
> "my" problem  with bicycle=no/dismount)
>
> Here in Italy we have heaps of pedestrian-only crossings, which are  
> part of dedicated combined foot-cycle paths or even pure cycle paths. 
> The legal requirements is that cyclists dismount to use them (which no 
> cyclist does, but that's a different story).

Where did you get this "legal requirement" from?
As a tourist I wouldn't interprete the sign as "forced to dismount", 
just as "there is no combined footway/cycleway" anymore.
In this case I would  just be carefully pay attention to the traffic 
situation - and go on as on every other combined road with motorvehicles.


> This feature of JOSM indicates to me that there is most likely 
> widespread use of bicycle=no on crossings with the meaning of 
> bicycle=dismount.
> (according to taginfo the combination crossing and bicycle is used on 
> 42000 nodes, bicycle=dismount is used on 1900 nodes, bicycle=no is 
> used on 56000 nodes
>
> A similar problem exists with cycle barriers (chicanes), where often 
> bicycle=no is used to indicate that you have to dismount to pass the 
> obstacle.
>
> I don't know how routers handle these cases.
>
> I fear that in the end we will be landed with the impossibility for 
> routers to distinguish between bicycle=no and bicycle=dismount at 
> least on nodes of type crossing and barrier.
>

You already got the point:
bicycle= no at OSM is always interpreted (and defined) as "no cycling".
bicyle=* is an access role, a part of vehicle(!) traffic, not an object.
It does not say anything about dismounted yet - this is an 
interpretation of "foot=*" which is the implicit role in most cases then.

And in the majority of situations in the world this is the normal 
combination.
There are only some singular situations where "pushing bicycles as an 
object" is not allowed.
In this situations I am always puzzled, what I have to fear, if I would 
carry the bicycle like a suitcase or parcel/packet ... none I suppose, 
but I never was in such situation yet.

Georg




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