On Tue, 2013-06-18 at 16:50 +0100, Steve Doerr wrote: > On 18/06/2013 16:45, News wrote: > > > >> > >> You are correct, we are talking about unclassified and tertiary roads. > >> Although this problem also occurs on secondary, primary and trunk roads, > >> a classification is a measure of importance and not always quality. But > >> where did the turning lane come from? or even lanes in many cases? > >> > >> Here is an example of why this tag is needed, and obviously support from > >> routers. > >> > >> http://osrm.at/3Hs > >> > >> This route misses two important left turn instructions, the instructions > >> should be > >> Turn left onto B5065 in both cases. > >> > >> Here is the first junction http://goo.gl/maps/ouXTC > >> > >> and the second, which is a very definite left turn, but easily missed as > >> routers assume you are continuing on the same road, without the > >> instruction anyone following instructions is likely to carry straight on > >> http://goo.gl/maps/DSDbt > >> > > > > Excellent examples Phil. I hope to redo this so may well use those > > > > Both examples could probably be addressed by give_way nodes on the ways > that are not the 'through route'? > Maybe, but not as concise as a relation and both require routers to interpret and use the information.
Adding give_way nodes today will not suddenly fix the erroneous routing instructions. Commercial satnavs have the same issue and this is an opportunity for us to be better. Phil (trigpoint) _______________________________________________ Tagging mailing list [email protected] http://lists.openstreetmap.org/listinfo/tagging
