[Tagging] unclear motorway_junctions

[Peter Budny]

Nathan Edgars II <neroute2 at gmail.com> writes:

> On Sat, Dec 4, 2010 at 3:10 AM, Peter Budny <peterb at gatech.edu> wrote:
>> Nathan Edgars II <neroute2 at gmail.com> writes:
>> I don't think the destination sign relation is quite for this... that is
>> (I think) more for having your satnav say "follow the signs for
>> Kalamazoo" and let you figure it out from there.  What I'm thinking is
>> more so that it knows how to describe a turn the way signs or local
>> residents describe it, which I think is what you're looking for.
>
> No, I'm talking about "take [left] exit 56 for Kalamazoo". When there
> are no exit numbers it's a little more complicated.

Ah; I looked at this and saw a different problem.  I'm used to a satnav
that doesn't know exit numbers.  All it says is "take the exit on the
left."  And that can be confusing when the road signs consider that
direction "straight".  Both cases you gave could have this problem,
since we can't use the highway=* tag to determine which way is
"straight" and which way is "left/right".

Anyway, to address your problem, destination sign relations would
definitely help.  The satnav may still say "left" when it ought to say
"straight", but it would be able to give a name for the driver to
follow, which is probably more helpful anyway.  Ideally *every* exit
would have multiple DS relations for everything that's labeled at that
exit, but it will take us a while to get there.
-- 
Peter Budny  \
Georgia Tech  \
CS PhD student \