[Symbiote]

The trams in Croydon work this way. There's an induction loop on the tramway which detects an approaching tram, and tells the traffic lights to change to allow the tram to cross the road/junction.

https://www.whatdotheyknow.com/request/tramlink_tram_priorit...

[aix1]

I just found this very nice paper about the transit priority system used in Zürich. Thought others might enjoy it too.

https://www.andynash.com/nash-publications/Nash2003-ZRH-PTpr...