On 11/21/12 7:32 PM, Anthony wrote:
On Wed, Nov 21, 2012 at 5:42 PM, Richard Welty <rwe...@averillpark.net>wrote:
On 11/21/12 4:00 PM, Anthony wrote:
If emergency responders are exempt from access restrictions (which they
are
in every jurisdiction I've ever read the law on), then the access tags are
of limited usefulness regardless.
they are valuable as a way of storing verified information.
By tagging a road the same way whether it says "emergency vehicles only" or
"do not enter", you don't gain information, you lose it.
huh?
a conventional driver won't enter the road either way.
a routing engine may need to make the distinction, and it's distinction
needs to be
made on the basis of local statute and/or policy. you've offered up a
case based on
"every jurisdiction i know of", which is anecdotal evidence at best. i'm
expecting to
encounter considerable variation based on jurisdiction as i build this
project out.
there will likely need to be local policy files for unique cases, but
the fundamental
question is are we going to reflect actual law/policy on the turnarounds
or the
the state of the signs.
we're losing information either way, the question is what kind of
information are
we prepared to lose.
richard
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