On Fri, 3 Feb 2006 16:49:53 -0000, "Martin Underwood"
wrote:

Any vehicle
which cannot achieve the legal speed limit for the road (assuming it is safe
to drive at that speed) is likely to cause an obstruction and should in an
ideal world be segregated from the traffic that can achieve that speed.

That's an interesting presumption! There's an obligation to travel
as fast as possible!