2012/11/18 Aun Yngve Johnsen <li...@gimnechiske.org>:
> I have mapped bus stops as a node next to the highway, and connected it with 
> a service way, at least where there are a bay where the bus can stop next to 
> the highway. This node could also be connected with a walkway or sidewalk 
> way, though I havn't started with that detailed level of mapping yet as there 
> still are a lot of unmapped territory in my area.


the thing is that a way tagged as highway in OSM is not a lane but a
carriageway, i.e. the sum of all lanes, according to common
interpretation also including footways aka pavement / sidewalk (as
long as they are not separated by e.g. a grass stripe, a wall, a
fence, a railing etc.). One might argue that also the kerb is such a
separation and the future will show how we deal with these details
(there are indeed some mappers, I think at the moment still in
minority, who draw pavements with their own ways, thereby in practise
often creating less optimal routing because of missing connections).
In this system it is not correct to draw a highway=service-way if
there is just a bay (i.e. the same carriageway with no physical
separation): the bay will already be implicit in the one and only
highway-way for the road.

To get routing to work it is not necessary that the bus stop is
connected to a highway, instead it is sufficient that there is a
highway close to the bus stop. We also don't attach housenumbers,
restaurants or post boxes to highways and yet they can be reached by
routing (the routing machine will determine which is the closed
reachable point on a highway and route you there).

cheers,
Martin

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