[Tagging] Tram tracks running in a road

Jo winfixit at gmail.com
Sat Feb 7 00:12:16 UTC 2015

The reason to use separate ways for trams can be seen in the other tram
tracks I mapped:


You can clearly see that very often the rails don't follow the asphalt
where the cars drive. Cars can make 90 degree turns, the tram rails need to
follow smoother curves.

So it's only in situations where buses follow the tram bedding:


that one can have common ways for the tram and that service road.

* For normal streets we draw 2 ways for the tracks and 1 for the asphalt
* For dual carriageways we draw 2 ways for the tracks and 2 for each side +
sometimes a service way between the tracks, when the buses use it too.

It's rather exceptional that the service road and the tram rails can use
the same OSM way.

Keep in mind it's only a model to represent reality. A model which uses
lines for what in reality are areas, so whatever we do, it will never be a
perfect fit.

I'm sure André won't agree with me, but to implement the solution he
proposes, we'd have to restart OSM from scratch. And even though it may
simplify and solve some things, it would make other stuff a lot harder.


2015-02-07 0:31 GMT+01:00 Janko Mihelić <janjko at gmail.com>:

> 2015-02-06 17:29 GMT+01:00 Luca Sigfrido Percich <luca.percich at gmail.com>:
>> We could also user a lanes modifier:
>> lanes=3
>> lanes:backward=2
>> tram:lanes:backward=yes|no
>> tram:forward=yes
> I think this is the best way to tag this. There's a great map paint style
> for seeing roads in towns in JOSM, and it helps a lot with tagging lanes.
> It's called Lanes and road attributes. Unfortunately, it doesn't show
> trams, but if we start tagging them, it will probably start rendering them.
> Right now, I use psv:lanes:forward=designated|no, because psv means all
> public service vehicles.
> http://wiki.openstreetmap.org/wiki/Key:lanes:psv
> And in my town those lanes are reserved for trams, buses and taxis.
> Janko Mihelić
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