I disagree, I'd suggest that those who over estimate their ability are actually in the minority amongst general road users. Perhaps your argument would be valid if we were only considering motoring "enthusiasts"
Not at all.
I'd suggest that most drivers out there only do so because they have to. They just want to get from A to B and don't care how, so long as they get there. The number of poorly maintained vehicles and number of people who don't even know how to do their POWER checks is evidence, since people might think twice if they knew what can (and does) happen when a vehicles goes out in that sort of state. From low tyre tread, to improperly deiced screens... and that's without all those drives who think they can put on lipstick, comb their hair, shave, eat breakfast, Tweet and whatever else while also driving...
You can factor for unknown risks in your decision making as a driver. Something we all do subconsciously on roads that are unknown to us, for example.
We can... doesn't mean we do.
I'm often remarked upon as being a very cautious driver and rider. Not lacking in confidence by any means, especially the remarks regarding my handling, but definitely cautious... That I seem to leave plenty of room for those unknown factors and it seems unusual to my passengers, I take as evidence that perhaps not everyone does this to a particularly great extent.
It was mentioned earlier in the thread, since the introduction of increasing speed enforcement accident rates have actually increased in the UK
This needs to be correlated with things like how often people actually watch their speed instead of the road around them, how many more vehicles join the roads, how often people are on their phones or fiddling with SatNavs, and so on.
It does, and the statistics are clear. Speed enforcement has increased accidents and increased the fatality rate.
So making people drive slower has made them crash more.... ?
Nothing to do with higher volumes of traffic going at the slower speeds, around which people are still trying to hoon?
Drivers do tend to drive within their abilities and conditions, else the roads would be carnage.
The most common cause of motorcycle accidents is another vehicle pulling out on the bike. The second most common is the rider overcooking it on a corner, usually a country twisty.
Neither of those particularly suggest either party is within their ability or appropriate to the conditions.
My one big accident occurred while I was stationary, bright brake lights on and indicator flashing, for a good 9 seconds beforehand on a straight stretch of road with perfect visibility. By the time the vehicle behind had slowed, it still hit me at around 60mph in a 40 limit. Police officers (two lovely WPCs from a Forensics unit) who witnessed the collision estimate she'd been doing at least 80mph. Hardly within the driver's ability or appropriate to the conditions.
As has been established by a few posters above, it's those driving without due care who cause the problems, and that won't change regardless of the imposed limit.
But lower speeds
do give you more time in which to correct things, which won't save everyone but will still save some.
What's needed is better driver education and a change in culture. Passing your test is not the end.
For most drivers, it is the end.
Many do not even care what all the different buttons in their car are for, never mind the correct way to use them... why would they care about advanced driving details like weight transfer, forward observation and planning?
Most of them don't look further ahead than the tail of the car in front.
but people really need to be shown how easy it is to get a car to slide and how you deal with that rather than letting people find out only after hitting their first patch of black ice in winter.
There isn't really such a facility readily available.
Already they made changes to the motorcycle licence to add certain factors, but even though that was more viable due to them having private compound areas in which to practice manoeuvres before taking it to the public road, the costs have gone up a good amount.
Now imagine having to apply that to every car driver...