The various larger transit agencies in the Greater Seattle area all have 65' articulated rigs. Some (maybe the majority) are powered by the front section, with an underfloor engine driving the wheels just ahead of the hinge. There are quite a few others where the back section is like a conventional bus, but without a driver's station, which is at the very front.
They have displayed one unfortunate tendency, which is to allow the pusher to get to too tight an angle and jam things up.
Frank Damp -Anacortes, WA,(DW- Eileen)
ex-pat Brits (1968) and now ex-RVers, as of 08 Dec 14.