On Fri, 10 May 2019 at 21:03, Nick Bolten <nbol...@gmail.com> wrote: > I still don't know when you think we should use crossing=traffic_signals... > > - A crossing might be marked on the ground >
Are there traffic signals which control BOTH traffic and pedestrians? If so, crossing=traffic_signals. If there are JUST road markings, no crossing=traffic_signals. - A crossing might have lighted signals for pedestrians to cross > Define what you mean by lighted signals. If you mean a Belisha Beacon or something else that WARNS motorists that pedestrians cross here but does NOT control traffic and pedestrians then it's not crossing=traffic_signals. A warning light is not a traffic signal. - A crossing might be protected by a traffic light that tells traffic to > stop. That light might be at the crossing or at a street intersection. > That's crossing=traffic_signals IF it also controls pedestrians. Walk/Don't Walk ot Red/Green figures or whatever. Otherwise it's just traffic lights. Even if people can cross there, it's still just traffic lights because the crossing (by people) Isn't controlled, just the traffic is. Traffic has to stop when the lights tell them, the pedestrians take their chances and are uncontrolled. - A crossing might be protected by warning lights to raise pedestrian > visibility > Not crossing=traffic_lights. Traffic lights control traffic, at a minimum. If they also control pedestrians then they're crossing=traffic_lights. If they just warn motorists they're not traffic lights of any kind. > > Which part(s) of that does crossing=traffic_signals describe? > See above. Just my own opinion, of course. > > > In any sane world, lights to control pedestrians also function as lights > to control traffic. > > Then we live in an insane world! I'm not aware of any lights that control > both pedestrians and traffic - they are oriented in orthogonal directions. > *Sigh* Was all this about pedantry? The same interlocked mechanism controls two sets of lights on the same pole, one set controls vehicular traffic the other set controls pedestrians. I didn't mean that both pedestrians and motorists stare at exactly the same set of lights. Similar to you, I have yet to find an intersection with a pedestrian signal > that does not have some form of either warning or explicit traffic control > (but it could be either one), but I wouldn't rule it out based on my > experience alone. However, the existence of a traffic light doesn't imply > any other infrastructure: the crossing might lack pedestrian signals, its > own dedicated light near the crossing, and even any particular visual > markings indicating where to cross. Despite this, the > crossing=traffic_signals tag has been used to describe all of these things, > somehow. > I don't think we can let occasional errors by novice mappers define tags for us. If such errors are widespread then we need to introduce a replacement scheme, encourage it for new use and manually replace the old scheme. -- Paul
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