Tram #4096, Edited Version, Wien (Vienna), Austria, 2013

In addition to dual-power trolleybuses, Wien also has traditional trams, credited with giving Einstein his ideas on the relativity of time at the speed of light, above it, and below it. These trams are of newer heritage, as you can see from the bogies (trams of Einstein's era were almost always four-wheel and non-bogey), but I know little else about them. Additional information would be welcome, although I may follow up with more research as it is.