On 03/11/2013 18:48, John Williamson wrote:
charles wrote:
Here, it's the countryside - narrow lanes, etc, - that have the lower
limits

If you take all the single carriageway roads in the country, over 50% of
the mileage has a 60mph limit. The maximum *safe* speed on them, on the
other hand....


The maximum safe speed is the speed limit (or less) as other road users
won't be expecting some idiot doing twice the limit and may well do
something that it is normally safe to do.
People that claim the safe speed is higher than the speed limit assume
they are the only road user and have X-ray vision so they can see
through objects.