[OSRM-talk] road double continuous line

[Philip Barnes]

On Wed, 2013-04-17 at 17:27 +0300, Marat wrote:
> Absolutely agree with Martin!
> At the time of proposal no routing engines were actively using OSM
> data and there was no actual use of it.
> Most of the users draw\tag for renderers. Why not to start tagging for
> routing software?
> The only problem might be processing of this tag in OSRM routing
> algorithms. 
> 
> Also there might be junctions were dividing line brakes to allow the
> left turn. And in this case we again need to invent new tag that would
> allow the turn.
> 
> I have attached the screenshot.

As a matter of interest, in Countries where it is illegal to turn across
a solid line, for there to be a junction without a break in the line?

I have driven in a lot of European countries and have noticed that there
are gaps in solid lines for every driveway. I have never come across a
situation where a turn is prevented by a line.

I suspect we would need more of the new tags to allow a turn, than just
use an existing turn restriction where needed.

This proposal would also need routers to understand the law in different
countries. In the UK you are allowed to cross a solid line if you are
turning, and it is common for the lines to be continuous across the
junction. 

Phil (trigpoint)