Quote Originally Posted by Corvettian
Trolleybuses are beginning to make a comeback, as a result of "environmental concerns". The European Union, for example, is promoting them, as well as electric public transport as a whole.
I'm sure in many places they didn't go away. In Zurich for example, as well as a dense tram network they also have trolley buses which go right out into the suburbs - they do have diesel buses too. But it means in the city centre there are very few oil burning vehicles, and it's a nicer place to be as a result.