Hello to everyone,
Voting has opened for the proposal of traffic_signals=crossing_only – see the proposal page here: https://wiki.openstreetmap.org/wiki/Proposed_features/traffic_signals%3Dcrossing_only
(please note the old name was traffic_signals=crossing_on_demand, but I changed that because the focus is not on the „on demand“, but on the „traffic lights for only a crossing“).
It has been discussed about on the mailing list at 2020-04-13 and a few days after.
The proposal's purpose:
traffic_signals=crossing_only marks those highway=traffic_signals which do only control a crossing
Why?
It's interesting for routers concerning penalty times (much lower on those points than for a junction) and at the moment, there is no real way to mark that:
highway=traffic_signals + crossing=traffic_signals is used together on the same node, but NOT only in those cases where there is a „crossing-only“ traffic light. It's also used on junctions. We discussed that it would be difficult to change that, because highway=traffic_signals + crossing=traffic_signals is an accepted tagging and can be used together also when the exact locations of the crossings - at a junction - are not known and in some other cases.
highway=traffic_signals + crossing=traffic_signals + button_operated=yes can be used, but with looking just at button_operated=yes, this does not mean that there is only a crossing and not a traffic junction. Crossings at junctions can have buttons for pedestrians, too, example: https://www.openstreetmap.org/node/3070180267
So the solution would be to add another under-category for highway=traffic_signals, as traffic_signals=* does it already.
--Lukas
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