SafeSpeed wrote:
Correctly set speed limits? Excuse me, but for whom?

Sorry, I didn’t put that as well as I could have. Perhaps “scientifically set” would have been better than “correctly set”. I was thinking of limits set along the lines of the 85th percentile rather than politically set ones set with more thought about the safety of council seats than that of road users.
SafeSpeed wrote:
I keep coming back to this point - the people who need speed limits most are the people who lack the experience to accurately adjust their speed according to the conditions. So that's 17 year old Kevin in his Nova.
Obviously any limit, regardless of what it says on the sign, is never going to be
correct 
for all drivers any more than it is for all conditions. However, for a number of different reasons I’m still not sold on the idea of different national limits for different licences. Frankly I can’t see how it’s better to have two or more limits strongly enforced than to have a single limit enforced at the discretion of superbly trained BiBs. And if it’s not going to be strongly enforced but discretionary, how is that any different in practice from discretionary enforcement of a single national limit?
SafeSpeed wrote:
I agree that most of us shouldn't be driving by numbers, but Kevin needs the numbers. The question becomes how are we best going to balance the needs of different road user groups, and I think national limits by driver class is quite likely to be useful.
We all seem to agree that it’s still driving by the numbers, and I’m really not sure that merely having two sets of numbers will move us forward a great deal. Like I said, I’m not sold…. yet

I could be, although I have serious doubts as to whether it will have undesirable side effects, adequate take up and for that matter, whether it will even be practical to achieve in the first place.
- Policing and enforcement. There has to be a way for the police to easily distinguish between drivers whose licences permit faster speeds and those whose licences don’t. We’ve really got two options AFAICS. First something really low tech, like a plate or something to display on the car, but which may have the big disadvantage of being transferable, nick-able, lose-able or all three. Second is a high-tech option, of which I’m as sceptical as I am of GPS speed control and per mile charging, and for broadly similar reasons. I don’t think the auto-only licence is a fair comparison since, as Rewolf says, it doesn’t seem to be actively policed at all. Ever hear of someone being caught with the wrong gearbox and prosecuted? I expect that if it ever happens at all it’ll be because the driver gets tugged for something else and the copper notices the licence and a manual gear lever. Also, these licences are pretty thin on the ground aren’t they? I’m prepared to be shot down on this, but having never in my life met anyone with an auto-only licence I think they’re probably too rare to make a fair comparison with a possible future graded licence scheme. I’d expect there to be millions more on the lowest rung above learner than currently auto-only licences, which would increase the difficulty in policing it effectively.
- Confusion. As I mentioned before, I’m not sure how it might look to a foreign visitor seeing it for the first time. “Two speed limits? Which do I use? Is the lower for trucks and other large vehicles so I use the higher one? Or is it for bad weather so I use both depending on conditions? Or are some drivers allowed to go faster, in which case what limit applies to my (insert nationality) licence? Basically, WTF do I do here? Sure, it’s easy to say that visitors should check these things out in advance, but people being people I expect many, perhaps a majority, won’t.
- Incentive to train. You’re pitching this concept at a group who are largely keen on driving, interested in road safety and are already inclined to look at means of improving their skills, and being legally allowed to drive faster may well be sufficient incentive. But I doubt it applies to the average driver. Much as I wish it were otherwise I honestly believe the best incentive for the majority would be financial. Advanced training is obviously an investment, but many people won’t see it as such unless they actually see some cash in it. Why would Joe Average spend £100 (or whatever) to be allowed to drive at the new faster limit when he’s spent years breaking the speed limit to go that fast anyway? On the other hand if his 100 quid looks good for a decent insurance reduction, or for that matter a reduction on any motoring expense, then he might think differently.
Absolutely agree that how we should balance all the different needs is an important question, but are we looking in the right direction for the answer here? I can see a role for different classes of driving licences, but so far nothing has been said that makes me think that defining what speed the holder may drive at is it. You’re absolutely right that we need the best carrots, but legal high speed driving is not the only carrot, and I feel that juicier carrots are probably out there.