On Sun, 19 Sep 2010 12:27:31 +0100, Paul Corfield
wrote:

There usually is. I have certainly experienced nearly being thrown on
the floor because a yoof decided that exiting via the rear door would be
a great idea while the bus was moving slowly in a traffic jam. The
brakes certainly came on!

Surprising - that sort of interlock is very dangerous on a road
vehicle, as it could maroon it in the middle of a junction. I always
thought it was a simpler form than you get on rail, in that the
handbrake wouldn't release if the door was open, but if the door
became open when the handbrake was released it wouldn't do anything.

Neil
--
Neil Williams in Milton Keynes, UK
To reply put my first name before the at.