[OSM-talk] Separate lane tagging

[Peter Wendorff]

Am 05.03.2012 12:51, schrieb Martin Koppenhoefer:
> For instance some time ago some mappers started to use 
> highway=footway, footway=sidewalk to map sidewalks with dedicated 
> osm-ways. This will in many cases actually lead to worse routing 
> results, as a destination just on the other side of the road will make 
> your router suggest to go via the next crossing (however far that 
> might be), instead of telling you that you have already arrived.
As I am one of these "some mappers", I only partly agree here:
The worse routing results should be very rare as I propose to add any 
crossings, that are
- marked explicitely or
- located at a street intersection (and it's possible to cross there).

In this case the only case, where worse routing results should appear 
is, when you simply want to cross a street and go to a place near that 
(where you don't meet a intersection in between).
But in that case usually you would not use a routing machine to get the 
directions, as it's a trivial task here.

If you want to have more explanation on that, please ask back ;)

regards
Peter