SafeSpeed wrote:
I'm going to put forward a few assertions for discussion in the hope that we can understand the bigger picture better. These assertions are not necessarily my beliefs (that's why this is in Brainstorming).
Careless and inattentive driving is not about 'hands and feet' - it's about 'eyes and brain'.
We tend to use proxies for inattentive driving and we say things like: "You can't be in proper control when you're eating an apple". But reality tends to differ. In an emergency we'd drop the apple and it'd make little or no difference to our control of the vehicle. The time we're truly NOT in control is when we're not looking where we're going or when we're not thinking about what we're doing.
I broadly agree, but add the qualification that
all drivers will have periods of inattention or distraction. It is sometimes said that safe driving requires 100% attention and concentration. That is clearly false. We know that levels of attentiveness and concentration vary and, on average, for nearly all drivers, is less than 100%.
I see COAST as the expression of a system for safe driving - a system that require an equilibrium to be maintained between (C)oncentration, (O)bservation and (A)nticipation (non-physical variables) on the one hand and (S)pace and (S)peed on the other hand (physical variables), in order to provide the (T)ime to react that is necessary for safe driving.
We can see that the "C", "O" and "A" inputs have qualitative and quantitiative components which are infinitely and constantly variable. For any given value of C + O + A, the physical variables, (S)pace and (S)peed, must be adjusted to maintain the equilibrium. Space and speed are interdependent - if there is less space, then speed must be reduced to maintain the equilibrium. If speed increases, more space must be found.
So C + O + A + [ (S)peed/(S)pace) ] = Time to react.Quote:
Careless and inattentive driving is usually involuntary
There are exceptions - such as idiots laying maps across their steering wheels and studying them - but most cases that ACTUALLY cause crashes are 'a moment's distraction' or 'a minor observation failure'. These failings do not take place deliberately - indeed most are shocked to discover that they have made them after the event. The errors are largely subconscious.
I think we have to be careful here. An error may be "involuntary" in the strict sense (unintended) but it is also, in many cases, "inadvertent" (failing to act carefully or considerately; resulting from heedless action). Behaviour that is only (and truly) involuntary is not culpable (or less culpable), whereas behaviour that is inadvertent, even if involuntary, is culpable.
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The law has no useful deterrent effect
How could it if the 'crime' is involuntary? That's why we have to pretend that the proxy measures (hands etc) are defining.
Not agreed. The objective is to reduce inadvertent, unsafe behaviour. This can be done, up to a point, by applying a legal sanction alone, but a combination of legal sanction and incentive would be more widely respected and more effective.
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Careless and inattentive driving are actually responsible for around 80% of crashes
That's my opinion based on reading a lot about crash contribution. That makes it the lion's share (obviously) of all crash causation - yet we don't seem to have any decent understanding of the problems.
I agree. If my perspective of 'COAST' as a system stands up, it is clear that the C, O and A elements are critical non-physical variables in the psychological domain. Speed is one of the physical variables that must be controlled, but an inappropriately high speed component is a consequence of insufficient C O A (and Space) that can only be assigned a value if the values of the other variables are known. That's why road safety policy aimed at 'forcing' the equilibrium merely by reducing the value of Speed will inevitably fail.
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Subconscious errors can only be reduced by psychologically sound policies
We need to help drivers to build better subconscious risk assessment processes. Better visual scan. Better learning from mistakes. Those sorts of things. Telling them that they must hold the steering wheel with two hands doesn't even come close. Telling them to stick to the speed limit is actually counter-productive because it takes precious attention away from more important safety factors.
Agreed. But, as you've said before, it's probably right that new or inexperienced or less capable drivers are directed to treat the speed limit as maximum because they do not have the higher qualitative values for hazard awareness that would allow the COAST equilibrium to be maintained at higher speeds.
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Careless and inattentive driving can usually only be enforced after the event.
We CAN'T even know that 'a moment's inattention' has taken place until it's caused a crash. This is another reason that we can't use the law as a deterrent - most offences are entirely invisible.
Partly agree. But deterrence is not the only function of law. The existence of a legal sanction is not enough by itself but is still necessary for other reasons.