[mkgmap-dev] Routing through bollard

Mon Oct 5 09:40:29 BST 2009

Hello Martin,

> 2009/10/4 Mark Burton <markb at ordern.com>:
> >
> > Hi Martin,
> >
> >> I also noticed this behavior at a bollard in my area.
> >> Since about the same time(~2 weeks ago), there also were problems with
> >> some turn restrictions being ignored.
> >
> > If there are problems, it will be something else that's wrong because
> > they are not related.
> >
> >> It seems to me that only "no_left_turn" Relations are affected(or no_*?).
> >>
> >> Example 1:
> >> http://www.openstreetmap.org/browse/relation/91270
> >> from Luxemburger Straße to Moselstraße
> >
> > Just tried that one and mapsource respected the no left turn.
> 
> Hmm, strange!
> 
> I rebuilt my map with yesterday's germany-extract from geofabrik
> (using r1240) and it worked.
> Then I rebuilt it with today's geofabrik extract of my state
> (nordrhein-westfalen) and r1260 - the restrictions were broken again.
> Trying it again with yesterday's germany extract and r1260, everything
> is fine...
> 
> I'll talk to Frederik and see what he thinks about this.

Yes, that is odd.

> Btw, back to the bollard topic: do you think it is possible to extend
> the add-pois-to-roads functionality to include other poi types and
> modify other values of the way?
> This way we could build rules that tweak routing by setting a lower
> road_speed or road_class around pois like traffic lights, pedestrian
> crossings or traffic calmings.
> this could help to for example favor right turns (left turns in
> britain) on crossings with traffic lights and a "right-turn-bypass".
> :-)

Actually, we're almost there in that my recent "exit road names" patch
does attach all POIs with "highway" tags to the respective ways and so
it just needs some code very much like the bollard handling code to
frig the road speed (or whatever is deemed appropriate for the tag) to
be added.

I will look at that this week.

Cheers,

Mark