A recently installed flashing "slow down 30mph speed limit" sign up the road from my home raises the issue of, why is it needed? There is a speed limit of 30mph on the road, a big sign indicating such, street lights, regular police presence busting good numbers of blind, stupid, ignorant idiots, unaware of such a speed limit, especially one that applies specifically to them. Watching the new sign light up for most cars has become a new pass time for me. Watching the brake lights on nearly every car light up as the sign flashes at each of them. Why does a flashing sign work when a regular 30mph sign has no effect whatsoever, or even a police radar speed gun pointing at them backed up with a fine and penalty points. Human behaviour never cease to amaze me.

_DSC1983w