MikeB4:
Why is a 10% power reduction so dangerous ? The vehicle will maintain speed and the driver has been warned prior. You can have greater effect by a headwind on the Wellington urban motorway.
You seem to have the notion that when the power drops 10% the vehicle will suddenly stop or reduce speed rapidly it won't. The 10% Wil feel like a headwind or going up a small gradient.
'The amount of power the engine puts out is something any driver adapts to. It guides how heavy you accelerate, how heavy you brake, and basically how you drive. Once again, spontaneously changing the power output is going to result in the driver basically driving an unfamiliar vehicle. And you talk about 10kW drops - to my vehicle, that's actually a 30kW drop. To some vehicles it will be even more drastic.
The reality is, your idea will make people no safer. It will in fact make people less safer. And you still don't even bother to answer half the concerns, simply repeating the same answer.
Fatigue is nowhere near the problem you make it out to be. For how small a problem it is, the solution is education, enforcement, and people taking responsibility for their own actions. Simple. And it frustrates me no end when people advocate just "make a technical solution" when social change is the clear winner.