So far, highway=traffic_signal is only defined for nodes and there are > only few ways and fewer relations. >
Correct. > > Also in favour of separation I would prefer to use junction=* with > name=* and only highway=traffic_signal with name if it is only a single > light (e.g. the case with a named junction and different separate names > for the lights) > > This way we could add an additional junction=* to the nodes with named > traffic_signal and once all lights are tagged separately only use > junction=* for ways. > Additionally we have a better hint for the renderer what to render and > diversify between a named junction and single named traffic_signals. > > cu fly > Hm, I am not sure if I understand you correctly. You want to use junction=yes not on nodes anymore, but only on areas – and change the currently existing cases in OSM? If so, I would disagree here. We have a yet existing tagging that works well for both – named junctions and names traffic signals – as long as this are simple junctions like https://wiki.openstreetmap.org/wiki/File:Junction_yes_example_1.png My proposal keeps the existing tagging for simple junctions – and extends it also to complex junctions. I am not convinced in changing the current tagging practice for simple junctions and require changing a lot of yet existing data in OSM. Currently I do not know of any situation where we have at the same place on the ground a different junction name and a different traffic signal name. It seems to me a barely theoretical problem. Maybe that does not mean that such a situation is impossible to exist. However, we should create our tagging scheme starting from the situation on the ground, and this seems to be either junction names or traffic signal names, but not both things at the same time. Replace an existing simple practice with a new complicate practice just to solve a problem that does probably not exist on the ground? However, I think it is nevertheless a good idea to think about this case. I would propose to leave the existing tagging for simple intersections as it is (with tagging on a node). Moreover, for the rare case that we have a junction and a traffic signal with different names, one of them could be represented by an area around the other one (and same thing on complex junctions/traffic signal systems). Thus, we keep a door open to tag two different names, just for the case that sometime we really need it. Nevertheless, we do not break compatibility with the current practice, and we do not make things unnecessarily complicate for the real-world cases. Lukas
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