Tim Lamb wrote:

And I don't believe people who say they know what speed they are doing
to within 2mph just by looking out the window either.

No. Engine noise perhaps.

Not in a decent car.

Most concentration is needed for maintaining
road spacing.

exactly. That's why I switched off the cruise control

Maintaining the spacing is the only thing that can make you safer on the
M25..that means speeding up to make sure some clot doesn't cut in in
front of you and then usually slam the brakes on when he realises there
WAS another car in front of you after all.. and backing off to open it
up again when no one is likely to do it..and accelerating past the
slower cars, and then finding a clear bit and dropping back the speed again.

Constant speed adjustment, as dictated by the traffic and forget the
bloody limits, because they are simply getting in the way of safe driving.

One immediate case springs to mind.

You are in the center lane of the motorway doing a legal 70mph.

the traffic in the slow lane, which you have been steadily overtaking at
a legal 70mph, stretches back unbroken for the previous 5 miles.

There is a gap 3/4 mile ahead.

You want to turn left off the motorway in 2 miles time.

Do you

(a) start slowing down and try to force your way into a gap in the slow
lane that isn't there?

(b) wait till you get to the junction and then stop in the middle lane
with your indicator going waiting for teh 5 miles of traffic to go past
and a decent gap in the slow lane? (this is actually the LEGAL course of
action)

(c) boot the car up to 100mph and make the gap well before the junction,
pull smoothly across upsetting no one (except Dennis, who is in the slow
lane in the middle of the queue, who moves out in front of you to stop
you, but you undertake him out of sheer evilness) indicate, slow and get
off the road disturbing no one?





regards