[OSM-talk] How do we tag passing/slow lanes?

[simon at mungewell.org]

> To annotate the physical:
> Break the way at the start and end of each passing section and tag with
> lanes=2 for the normal sections (assuming its normally a two lane
> undivided
> highway) and lanes=3 where the way includes the passing lane.
>

My understanding is (was?) that the lane tag indicated how many lanes
there were in each direction, so '1' would indicate a road which was 2
lanes, 1 in each direction.

The definitive answer is rather blank on the matter:
http://wiki.openstreetmap.org/index.php?title=Key:lanes&action=edit

>
>>
>>It would also require some fine tuning of which lane merged back into the
>>normal flow, ie. did the 1st or 2nd lane have to merge?
>>
>
> Do we really care?

It might help with routing instructions such as 'keep right' prior to a
lane suddenly being coned off (found a few of these in France).

It's all about the attention to detail you know... ;-)

Cheers,
Mungewell.