On Sun, 03 Nov 2013 21:40:51 +0000, dennis@home wrote:

The maximum safe speed is the speed limit (or less)

So if 60mph was "safe" on a particular stretch of road yesterday, 31mph
will be "unsafe" today, even if the only difference is the removal of
some binbags?

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.

Perhaps the most basic tenet of defensive driving is to expect the
unexpected, and to prepare for ****s doing barking mad things.