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<div class="moz-cite-prefix">On 2014-06-15 20:44, Peter Wendorff
wrote :<br>
</div>
<blockquote cite="mid:539DE99C.1030309@uni-paderborn.de" type="cite">
<pre wrap="">Hi Andreas,
IMHO
- access=emergency is a basic access restriction, which states that only
emergency vehicles are allowed here (unless otherwise specified).</pre>
</blockquote>
According to <a
href="http://wiki.openstreetmap.org/wiki/Key:access">Key:access</a>,
there is no access=emergency, only emergency=yes
<blockquote cite="mid:539DE99C.1030309@uni-paderborn.de" type="cite">
<pre wrap="">- emergency=yes is such an "otherwise specification" where the main
access rule is different, it's simply another way to define the same.</pre>
</blockquote>
<b>emergency=yes</b> allows emergency vehicles indeed, but does not
exclude other vehicles.<br>
It's unfortunately a very common routing mistake that misleads the
very logical GPSes.<br>
To exclude all other vehicles, one must add (<a
href="http://wiki.openstreetmap.org/wiki/Key:access#Land-based_transportation">see
key=access category tree</a>)<br>
access=no<br>
Or, to exclude just motor vehicles:<br>
motor_vehicle=no<br>
etc.<br>
That is, a higher level (or other) "no".<br>
Routers will obey those tags.
<br>
<blockquote cite="mid:539DE99C.1030309@uni-paderborn.de" type="cite">
<pre wrap="">- service=emergency_access sounds more as a subtag for highway=service
and my interpretation would assume this is a service way with the
primary purpose to allow emergency vehicles to access another facility
(be it a building, highway or anything else).</pre>
</blockquote>
The status of <a
href="http://wiki.openstreetmap.org/wiki/Tag:highway%3Dservice">highway=service</a>
is very ill defined regarding to routing.<br>
It indicates that the road is for loosely defined special usage.<br>
service=* is supposed to indicate which (only one!).<br>
Routing is supposed to deduct country dependent access rules but I
doubt it does.<br>
I think that access= + emergency=yes suffice to characterize such
roads indubitably.<br>
<br>
Cheers,<br>
<br>
<table>
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<td>André.</td>
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<br>
<blockquote cite="mid:539DE99C.1030309@uni-paderborn.de" type="cite">
<pre wrap="">service=emergency_access might allow usage by others, but usually
forbids e.g. parking (if it's an access road to a building)
access=emergency should usually be implicit on any other access and
therefore might usually refer to ways where only emergency vehicles are
allowed (although e.g. highway maintenance vehicles and similar stuff
might be allowed to share these ways).
regards
Peter
Am 15.06.2014 17:07, schrieb Andreas Goss:
</pre>
<blockquote type="cite">
<pre wrap="">So I got a bit of work done with the WikiProject Emergency Cleanup, but
now I'm not really sure about emergency access.
- Is there a difference between service=emergency_access,
access=emergency and emergency=yes(on roads)?
- What exactly is their meaning? Is it only for designated emergency
access roads (<a class="moz-txt-link-freetext" href="https://de.wikipedia.org/wiki/Feuerwehrzufahrt">https://de.wikipedia.org/wiki/Feuerwehrzufahrt</a>)?
- Are there even any roads where emergency vehicles usually aren't
allowed to drive and you then have to indicate if they are allowed? Like
when would you use emergency=no ?
- Or was it meant for roads, which bascially had access=no, but allowed
for only emergency vehicles?
The only thing I could find apart from a mention on the access=* page
was this proposal:
<a class="moz-txt-link-freetext" href="http://wiki.openstreetmap.org/wiki/Proposed_features/emergency_vehicle_access">http://wiki.openstreetmap.org/wiki/Proposed_features/emergency_vehicle_access</a>
I'm considering starting a proposal for something like
access:emergency=yes/no/designated/..., because using access=* means you
can't combine it with a different access attribute and emergency=yes
says very little and is also used on other things.
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<pre wrap="">
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