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 https://wiki.openstreetmap.org/wiki/Red_turn 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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