On Fri, 30 Jul 2010 03:40:11 -0700 (PDT)
Andy wrote:
You seem to miss the subtle detail that the distances are massively long
for any even remotely competent and roadworthy vaguely modern vehicle.

I don't think that they're massively long. If you look at the table in
the highway code, it gives the distances in terms of car lengths
(being 4m):

Frankly who cares and why do they bother anyway. Its not possible to accurately
gauge distance from behind the wheel of a car so its all a waste of time.

B2003