[OSM-talk] Lane turn restrictions

[Roy Wallace]

On Fri, Aug 21, 2009 at 6:11 AM, Tobias Knerr<osm at tobias-knerr.de> wrote:
>
> I believe it fits the project's general spirit to allow mappers to
> choose their level of detail (and other mappers to increase it if they
> are ready to invest the time).

+1

> Lod steps could be described as
>
> 1. road without lane detail
> 2. road with partial lane data (think cycleway=lane)
> 3. road with full lane data, but no lane geometry
> 4. road with full lane data and partial lane geometry (e.g. individual
> ways only for pavements and bicycle lane, but not for the perfectly
> parallel car lanes)
> 5. road with full lane data and geometry

So, the question becomes, which of the above are already achievable/in
use with existing tags, which are in proposal stage, which need new
proposals.

And then back to the question, how to model LTR (lane turn
restrictions) for ways with each of the above LOD's (level of detail).
Obviously at least LOD 2 will be required. But we may find that it's
only possible to model LTRs simply for ways with LOD 3 or above.