In article , (Roland
Perry) wrote:

In message .uk, at
15:07:00 on Sat, 1 Mar 2008, Colin Rosenstiel
remarked:
And is there any world experience of high capacity modern double-deck
trolleybuses at all?

They have very effective trolly-bendy-buses in Geneva.

http://www.railfaneurope.net/pix/ch/.../Geneve-02.jpg

And some that are more like trams-on-tyres:

http://www.railfaneurope.net/pix/ch/.../Geneve-04.jpg

That's the only one looking to be above what diesel technology could
deliver. I note that Geneva trolleybuses are all single deck, though.

The only remaining modern double decker trolleybus may be this one in
Hong Kong (a trial, apparently now discontinued):

http://www.trolleybus.net/hk.htm

It's not clear how much bigger than a standard diesel double that is, let
alone whether it would be able to work in the UK.

--
Colin Rosenstiel