user_17724595
You could just tag the node at the intersection like this: https://www.osm.org/node/42890012
Some more here:
https://overpass-turbo.eu/s/1ppg
Though, I'm not sure if it will render on the map if there's no traffic light there.

Here's another approach: https://www.osm.org/node/5796751154

I'll try to look into this more later.