09-08-2014, 09:03 AM
Comes back to this problem of making something law - once it's law it stops being common sense. Of course you don't drive through built up areas at more than 30, because you never know when some little rug rat is going to leg it out into the road. You let off the power when you see a sign for a junction on approach to a corner, as there could be a slow-moving car that's just pulled out on the other side of the corner. When there's a tight bend you slow down for it so the car doesn't fire off into the surrounding undergrowth. A sign that warns you should only be doing 30 through a particular corner a) is completely over-cautious for 90% of driving b) encourages the kind of tit that's likely to be going too fast anyway, and c) more dangerously, it stops everyone else thinking about it for themselves. What happens when it's unusually slippy conditions? People are ignoring the sign because of a), going too fast because of c) and probably worrying more about the b) behind them than the fact that they're about to understeer off the road thanks to the conditions.