[Tagging] Use cases: where would a count of all lanes be useful?

[Nathan Edgars II]

On 9/19/2011 3:28 PM, Jo wrote:
> That's how the JOSM turnlanes plugin helps to tag it. It neatly
> describes the length of the turn lanes and where they lead the traffic
> to in a bunch of relations. The only thing missing from it is a way to
> indicate where exactly the turn lane starts (instead of making an
> estimation in meters).

Ah, http://wiki.openstreetmap.org/wiki/Relations/Proposed/turn_lanes . 
Would it be possible to modify this to allow a node for the beginning of 
the lane rather than its length?