[Tagging] exit_to on motorway_junction

[Philip Barnes]

On Sun, 2012-11-18 at 21:26 +0100, Colin Smale wrote:
> Phil, there's a difference between routing calculation (which neither 
> knows nor cares about road names, numbers, signposts etc) and how the 
> result of the calculation is presented to the user. Then you need to 
> relate the nodes/edges in the routing graph back to the real world. The 
> value in this tag (as well as name, destination etc) is that the 
> navigation software can give instructions based on recognisable 
> landmarks instead of referring to way IDs. This distinguishes between 
> pure "routing" and "useful navigation".
> 
Thats the point I am making, the most useful instruction a satnav can
give is "leave the motorway a junction 4", or words to that effect.
There is nothing more recognisable than the junction number.

Phil