"Dave Liquorice" wrote in message
ll.net...
On Tue, 24 Mar 2009 20:49:14 -0000, mark wrote:

The warning says something like: Will come to a Sudden Stop at the Red
Line.

How does that work?

Must have posh trollies if they have an electical automatic braking sytem,
either that or an awful lot of tea leaves to make such a system worth
while.

I've seen a Lidl with notices saying that trolleys will stop beyond this
point. I'm not sure that could have been done with inductive loops though,
as the system had to allow customers to cross a public road to get to the
overflow car park, so any loops would have needed to be buried in the road.

Colin Bignell