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<div class="moz-cite-prefix">On 2016-12-08 09:36, Volker Schmidt
wrote:<br>
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cite="mid:CALQ-OR4ZdBsbsCCK0Z3v6KqyDOq6O5wfvQO9R9aL3qifPtzk5g@mail.gmail.com"
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<div class="moz-cite-prefix">On 2016-12-08 03:09, André Pirard
wrote:<br>
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<blockquote cite="mid:5848C0CE.1060508@gmail.com" type="cite">
<div class="moz-cite-prefix">On 2016-12-07 22:53, Martijn
van Exel wrote:<br>
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cite="mid:CAGCum_7Xu8ECED1PAVMcA69fjK5h2uF_7xs1s_nW6Q22Liyimw@mail.gmail.com"
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<div dir="ltr">Hey all,
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<div>Apparently there are roads that have an 'ongoing'
U-turn restriction, see the sign here for example: <a
moz-do-not-send="true" class="moz-txt-link-freetext"
href="http://openstreetcam.org/details/10053/304"><a class="moz-txt-link-freetext" href="http://openstreetcam.org/details/10053/304">http://openstreetcam.org/details/10053/304</a></a> </div>
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<div>I know how to tag this for an intersection but not
how to do it for an entire way where U-turns are
prohibited.</div>
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The concept of a node where one cannot U-turn and where one
could U-turn 1 meter before it is a strange one.<br>
In Belgium, <a moz-do-not-send="true"
href="http://www.code-de-la-route.be/textes-legaux/sections/ar/code-de-la-route/251-art68">signal
C33</a> indicates that one cannot U-turn from the position
of the signal up to and including the next crossing. It's
obviously always in force over a span of the highway, it
indicates a one-way section and the simplest way to indicate
that is oneway=yes.<br>
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<br>
This is interesting and closely related to the question how we
tag, on two-way roads, continuous middle lines (or double
continuous middle lines) that imply continuous stretches of
road with "no-u-turn", no passing/overtaking, and
"no-left-turn" (in countries with right-hand traffic). <br>
In addition there seems to be countries (I am not sure) where
u-turns are generally forbidden on certain classes of roads.<br>
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Why do we not use u_turn=no on highways, similar to the
overtaking tag? I am also wondering why "overtaking" in reality
is not frequently use either, worldwide only 40,000 tags.<br>
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<br>
I have taken permission to reintroduce the quote showing what's
interesting.<br>
And thank you for recalling a subject I once raised.<br>
Those Belgian white lines preventing U-turn (without oneway) are
jurisdiction-dependent indeed as well said further.<br>
I had abandoned the discussion, taking it as the usual "no" the
answers that it's not so everywhere.<br>
But as said further too, what we map is not the color or form of the
lines but their meaning.<br>
<br>
And what I mostly mentioned before, is that those Belgian lines not
only forbid U-turn,<br>
but also turning left (in right-hand drive) when coming from a side
road.<br>
I find this important because it makes a lot of missing, difficult
to map turn relations unnecessary. <br>
But I suppose it would have, because of jurisdiction-dependency,
mapped differently than U-turn.<br>
<br>
Interesting discussion.<br>
<br>
Cheers
<br>
<br>
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<td>André.</td>
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