Rupert Candy wrote:

In fact, it's quite a lot like the Nancy tram-trolleybus I've mentioned
elsewhere on this thread, but without the clever bi-mode bit.

The Nancy guided trolleybuses raise an interesting conundrum for the
pro-trolleybus/anti-tram faction: They can run as guided trolleybuses,
unguided trolleybuses, guided buses, or just buses. However, identical
vehicles run in Caen, except that they use a pantograph (with return
via the guide rail), instead of twin trolley booms. Thus they are
restricted to guided trolleybus (or should that be rubber-tyred tram?),
guided bus, and bus modes.

Is Nancy acceptable to the trolleybus people, and Caen not?