[Tagging] Divided highways, and not so divided highways, one way or two

Florian Lohoff f at zz.de
Thu Oct 10 18:07:11 UTC 2019

On Thu, Oct 10, 2019 at 07:53:39PM +0200, Markus wrote:
> That's not true. There's another way to tell routers that it is
> illegal to change lanes: by adding that information to the highway=*
> way. There's already a tag for this: change:langes [1] (> 90 000
> uses).
> While mapping separate ways where there is no physical barrier works
> for car routing, it breaks pedestrian routing and there's likely no
> way to fix this. Pedestrians usually are allowed to cross a painted
> line that cars aren't allowed to cross (at least in Europe).
> Therefore, if the road in your example is mapped with two separate
> ways, a routing engine would make pedestrians do a detour (possibly a
> long detour), even though they could just cross the street.
> [1]: https://wiki.openstreetmap.org/wiki/Proposed_features/change

The road in question here (where is originated) is foot=no.
So no pedestrians.

And IMHO change:lanes describes whether changing to a different lane
going the SAME direction is legal.

Florian Lohoff                                                 f at zz.de
        UTF-8 Test: The 🐈 ran after a 🐁, but the 🐁 ran away
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