wrote:
On Tue, 21 Jul 2015 10:26:57 +0100
Neil Williams wrote:
A professional driver needs to drive to the capability of their
vehicle. Perhaps reduced acceleration will stop the passengers being

A professional driver yes, but we're talking london bus drivers here. I'm not
sure I'd class all of them as having a professional approach to the job.

c) the electrical system failing meaning loss of steering control -
this has happened umpteen times.

*Loss* of steering control, or just loss of power-assist? I didn't

Almost certainly the latter, though in such a large vehicle it will be
almost impossible to turn the wheel when stationary if the power assist
has died.

Yes, I agree. Some amount of power steering would be essential with a heavy
bus. I'm guessing it has speed sensitive power steering, that should
provide more assistance at low speeds, but is failing to do so.

My car is like that, and sometimes if the battery is very low and only just
capable of starting the car, you don't initially get that extra assistance.
The car remains perfectly drivable, but steering at low speeds just needs a
bit more effort. It seems like the brake assist computer doesn't boot
properly if the battery is low; if your turn off and start again,
everything goes back to normal. The problem never occurs if the battery is
properly or even half charged, so the problem isn't easily repeatable: once
you've been running for a few minutes, the problem doesn't occur.