[Tagging] Tagging 'advance' turn restrictions

[Tom Pfeifer]

On 05.04.2017 23:19, Warin wrote:
> Where the solid lines start have a separate way for each lane

Do _not_. Separate ways are used when the roads are physically separated, not when a white line is 
painted. Lane mapping would get you reverted.

> this way routing engines will regard them as separate roads and stop trying to get you from one lane
> to another.

OSM is not only for car routing. Imagine a chicken wants to cross the road, and stumbles over all 
those separate ways just representing lanes.

> Then do your turn restrictions.

Turn restrictions are not used for restricting the change of lanes.

> On 06-Apr-17 04:09 AM, Kevin Kenny wrote:
>> Do we have a scheme for tagging such a beast?

You can combine turn:lanes [1] with change:lanes [2], the first describe which lane you have to use 
for which turn, the second where you can change lanes and where not.

[1] https://wiki.openstreetmap.org/wiki/Key:turn
[2] https://wiki.openstreetmap.org/wiki/Key:change

If you want to show us the current situation, you can drive along with the mapillary app and upload, 
so you don't need to show outdated G***** pictures ;-)

tom