[Tagging] Turn lanes separated by road markings

[Jan Michel]

Hi Markus,

On 06.09.19 21:07, Markus wrote:
> https://www.openstreetmap.org/way/430073056
> 
> Do we have a relation for storing the information that the left lane 
> continues on [way 
> 394112487](https://www.openstreetmap.org/way/394112487) and the right 
> lane on [way 290130794](https://www.openstreetmap.org/way/290130794)? 
> This information is important in order that routers don't announce too 
> late (i.e. when the lanes can't be changed anymore) which lane one has 
> to take.
We do have a (recently approved) relation type for this: 'connectivity':
https://wiki.openstreetmap.org/wiki/Relation:connectivity

> Or is turn:lanes + change:lanes enough? (And what if there were no turn 
> lane markings?)
In this case with a simple 2-lane way splitting into 2 1-lane ways I 
would not use this relation - it should be obvious to all routing tools 
how these ways relate to each other. The example looks more complicated 
than it actually is, because some ways are oneways and some are not. For 
routing purposes, the lanes in each direction can be treated separately 
from each other.


Jan