[Tagging] Through_route next steps

[Philip Barnes]

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)