Tram entry/exit
it says:
"To exit please, push the button"

"Bim" is what people here call their "Straßenbahn" (tram),
"Öffis" are all p. c. (tram, metro, bus)
Wiener Linien

I've always been a big fan of means of transportation
and do a lot of research of any kind of public conveyance all around the world.