[Tagging] New Proposal

John F. Eldredge john at jfeldredge.com
Fri May 3 17:38:21 UTC 2013


In my experience, routers say "stay left" in such a circumstance.


News <news at pointdee.co.uk> wrote:

> On 02/05/13 00:40, Dave F. wrote:
> > On 01/05/2013 18:26, Philip Barnes wrote:
> >>
> >> 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.
> >
> > The blue line shows it knows where to go. There's nothing wrong with
> it
> > calculating the directions, but, as kytomaa suggests, it's missing a
> > written instruction.
> >
> > The OP's assertion that it's impossible to determine is a bit
> dramatic.
> > The orientation of the ways to each other & that a road reference
> > appears to change is irrelevant - if users wants to go to
> Haslingden,
> > that's the road they should be on. Instructing them can't be that
> hard:
> > "Take next left junction to stay on the A56". or how about this:
> > *http://tinyurl.com/br5c3fm*
> >
> 
> So "impossible to determine" might be a little strong but the problem
> is 
> that routing software will not give the direction "Take next left 
> junction to stay on the A56" as it does not realise that there is a
> turn 
> here That's what the through_route relation is attempting to remedy.
> 
> Thanks
> 
> 
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-- 
John F. Eldredge -- john at jfeldredge.com
"Reserve your right to think, for it is better to think wrongly than not to think at all." -- Hypatia of Alexandria



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