Oh, sorry about that, and it's not an argument, just an opinion.
Speed cameras are put about as some sort of panacea (usually, as seen above, alongside the BS that speeding drivers cause 1/3 of all fatalities). IMO, they are one weapon in the arsenal against crap driving and not a very significant one at that.
OK. I would agree that cameras are only one part of road safety, but I firmly believe that speeding should be firmly clamped down on - we need to remove the attitude that speeding is OK. It's not.
Speeding may not be the direct cause of most collisions (I wish people would stop calling them accidents) but as I have already said, all other things being equal, speeding will make any collision more likely and more serious.
Speeding is a serious problem, and should be stamped out - along with other dangerous driving.
This is worth a read - I haven't read it all, but:
Almost 50% of the accidents were judged to be speed related but among drivers
aged under 25 years speed was a factor in between 65% and 75% of their accidents
(see Figure 3.2). Men were found to be involved in a far greater number of ‘to
blame’ speed-related accidents than women (57% and 31%, respectively). Men were
more likely to commit deliberate risk actions than women and are more likely to
exceed the speed limit or deliberately drive too fast for the conditions. By contrast,
women were more likely to have been ignorant of the correct speed limit or to be
travelling too fast for the conditions rather than deliberately speeding (Clarke et al.,
2007).
Because some drivers cannot be trusted to safely exceed the posted limit, then I'm afraid we must insist that no drivers may exceed it. That means that drivers that can safely exceed the limit are inconvenienced, but that's just tough.