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<p>Isn't it sufficient to use this red_turn-tagging at the traffic
light (instead of a turn relation), since it restricts to whom the
traffic light applies? General turning rules remain unaffected.</p>
<p>This tagging obviously comes from the German-speaking area (see
also TagInfo map), because there is the "green arrow" sign on some
traffic lights (originally invented in the GDR, later adopted in
other countries all over the world): It allows to turn right at
red light. In China, the same regulation applies as in the USA
(turning at red light always allowed unless other signing).</p>
<p>Alex</p>
<div class="moz-cite-prefix">Am 11.10.20 um 18:11 schrieb Joseph
Eisenberg:<br>
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cite="mid:CAP_2vPiuBPqOWBSY-r=0MOc4pKF8i3ocXDudQJ8Nx-2uEboZnA@mail.gmail.com">
<pre class="moz-quote-pre" wrap="">In North America (since we hate pedestrians) usually it is legal to turn
right at a red light (we drive on the right side of the road, so a right
turn only involves crossing into one lane).
At some intersections where there are many pedestrians, there are signs
that say "no turn on red", or sometimes "no turn on red except bicycles".
Should this be mapped as a Relation:restriction? For example, a relation
with "restriction=no_turn_on_red" + "except=bicycle"?
Alternatively, I see there is a tag used in Europe in the form
"red_turn:right:bicycle=yes" + "red_turn:right=no" - this would mean that
bicycles may turn red at a traffic signal but other vehicles may not turn.
This is documented at <a class="moz-txt-link-freetext" href="https://wiki.openstreetmap.org/wiki/Red_turn">https://wiki.openstreetmap.org/wiki/Red_turn</a>
That tag is also used when right turns are allowed, e.g.
"red_turn:left=yes", when this would not always be expected. It's most
often used in Dresden.
Oddly, it is proposed on the page that you could also use
"red_turn:straight:bicycle=yes" to say that "bicycles are allowed to go
straight at this traffic light when it is red", but this sounds very
strange to me.
I wonder if "red turn" is a translation from German or another language?
-- Joseph Eisenberg
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