https://de.wikipedia.org/wiki/%C3%96PNV-Bevorrechtigung
(Sorry, no english version available)
http://www.ukmotorists.com/tram_signs.asp
For buses, there would be a normal traffic light controlling only a bus lane, usually labelled with the blue buses only sign. It's not very common, but I know a couple of cases in London.
http://www.ukmotorists.com/tram_signs.asp
For buses, there would be a normal traffic light controlling only a bus lane, usually labelled with the blue buses only sign. It's not very common, but I know a couple of cases in London.