On Tue, 20 Dec 2011 07:23:40 -0800 (PST)
bob wrote:
extend or contract in length. On a double decker, the floor that does
not contain the axis of rotation will experience an extension or
contraction of the floor as well as rotation. One of the floors will
therefore experience extension and contraction as well as rotation,
which is a whole lot less safe.

I'm sure people would get used to it just like they've got used to the ends of
escalator. But if its really an issue you could simply wall off the seperate
compartments of the tram.

B2003