On Wed, 2013-05-01 at 18:20 +0200, Georg Feddern wrote: > Am 01.05.2013 12:53, schrieb Philip Barnes: > > > The slip roads are straight ahead, whilst the through route curves > > to the right. The tag is need to tell the router that straight ahead > > is not stay on the same road. > > > > Hope that explains it. > > > > > > > > uhm, had you ever considered to tag both following ways as *_link? > > In my opinion > - the A56 is a trunk_link, because you have to leave the previous > lanes. > - the A682 is a primary_link, because you leave the A56. > > In _both_ cases you need a hint from the router to be warned (like > "keep left" or "keep right"). > And AFAIK this would be already supported by routers. > > Just my 2 cents.
That is just one example, this problem does not only exist with grade separate roads. Take this example, http://osrm.at/36D To stay on the A511 no instruction to turn is given, therefore it is easy to continue straight ahead. Here it is on streetview http://goo.gl/maps/8csRf (can you imagine a world without streetview? wish we could do an opensource version). There are lots of cases where it would be useful to give a mapper the means to improve routing by a simple relation. Phil (trigpoint) _______________________________________________ Tagging mailing list Tagging@openstreetmap.org http://lists.openstreetmap.org/listinfo/tagging
