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

[simon at mungewell.org]

> Two Way residential road with one lane in either direction: lanes=2
> One way road: lanes=1
> individual carriageway for three lane motorway: lanes=3
>
> With a rationale that this would then clear up confusion, and help with
> recording information such as single lane width restrictions, passing
> places etc.
>
> I then assume that some of the highway tags could then assume a lanes
> value (residential, unclassified, tertiary:  lanes=2)
>

I would agree with this 'proposal', seems to handle all situations even
covering 'traffic calming' techniques where a lane is deliberately
obstructed and traffic needs to wait for a break in oncoming traffic.

The one area it doesn't cover is the merging of lanes I mentioned earlier,
as I have seen it describing lane counting from the 'slow' lane. In a
non-segregated road I suppose you could count from the slow lane in the
direction of the way, but then we're back to the switch directions
problems.

Cheers,
Mungewell.