It's a special operation, requiring special signage, and awareness of the driver. Here in Hamburg, where the S-Bahn using third-rail got extended to service Sta

It's a special operation, requiring special signage, and awareness of the driver. Here in Hamburg, where the S-Bahn using third-rail got extended to service Stade, is using multi-system rolling stock now. Which traverses the gaps by rolling without power through that gap. I also remember standing on some platform above ground, where you could see them coming over a ramp, with the pantograph up, on a piece of track using third rail. Wondering how that happened, and what would happen if it goes back into a tunnel (with third rail), like that. Or under a bridge, overpass, all built with low clearance, because: hey, third rail! Nerd that I am, I walked up to the driver, knocking on the glass and asked: "Moin, do you know your pantgraph is up?" Turned out he didn't, and there wasn't any indication. He got it down by repeatedly switching up/down, and finally it stayed down. Two minutes late!1!! ;-)