An endangered Species

The other day I read in the newspaper that soon these profession is not longer going to exist. In German is called "der Zugabfertiger" I looked for a translation into English and I could not find it. Is this just a German thing. Well I have to explain what he does: he gives the signal to the train to leave.
Now I want to draw so many as possible, I guess is an Urban Sketcher mania to document things that are going to disappear.