[Tagging] How to tag: Legally separated ways (2nd Part)

Martin Koppenhoefer dieterdreist at gmail.com
Wed Oct 17 10:09:41 GMT 2012

2012/10/17 Martin Vonwald <imagic.osm at gmail.com>:
> Same image as before:
> http://wiki.openstreetmap.org/wiki/File:Lanes_Example_2.png
> Now consider part 4 to 6. At what point would you split the way coming
> from part 4?
> a) Before the end of part 4
> b) At the end of part 4/start of part 5
> c) In the middle of part 5
> d) At the end of part 5/start of part 6
> e) Tell me!

isn't this almost the same question? If you don't split the way for
part 5 you cannot do a) or b) and given how short part 5 is, there is
no real difference between c) and d) (but splitting "in the middle"
doesn't seem good advice at anytime).

> Two more questions to slip lanes:
> Where would you start the way of a deceleration lane?
> a) At the beginning of the lane
> b) In the middle of the lane
> c) At that point where it is legally not possible to leave/enter the
> deceleration lane
> d) At that point where the lane is physically separated from the motorway
> e) Tell me!

don't understand c)
currently you should do it at point d) to be consistent with what we
have said before.

> Where would you join the way of a acceleration lane with the way of
> the motorway?
> a) Where the physical separation ends
> b) Where the legal separation ends
> c) In the middle of the acceleration lane
> d) At the end of the acceleration lane
> e) Tell me!

a) according to what we have said

actually the by far most often practised mapping according to my
experience is b) and for the first question c) which also make certain
sense in the case of a motorway. In practical use there is mostly
never a difference, as on the motorway sat navs tend to tell you
already kilometers before what your next steps will be.


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