>For person like me that takes very light naps when sitting, 10 seconds is plenty to wake up and take control.
I'd argue that isn't remotely enough time to safely take control. You're betting your brain wakes up sufficiently in that time, and if it doesn't the consequences are potentially deadly.
>Also if I am using a tablet doing email or browsing or even playing games, 10 seconds is plenty of time to put the tablet away and grab the wheel.
That's a bit better from an alertness standpoint, but not from a situational awareness one. You're deprived of both context and situational awareness on the road.
Some key details extend far beyond a 10-15 seconds, such as: another car driving erratically, lanes ending, line of sight on pedestrians or cyclists visible prior that are now occluded by traffic. The list goes on.
>>Also if I am using a tablet doing email or browsing or even playing games, 10 seconds is plenty of time
> That's a bit better from an alertness standpoint
How do you know?
Subjective measurement of time is very inaccurate. I have experienced this, when I timed some regular activities I undertook every day, total habit. I would have said they took me ten seconds. When I timed them, it was forty five seconds.
I have no faith in anybodies' perception of how long they can switch context like this unless they have objectively measured it
That's a good point. On the face of it, I'd assumed an awake person already engaging their brain would perform better than a person just waking up in that context, but perahps not.
>I have no faith in anybodies' perception of how long they can switch context like this unless they have objectively measured it
Agreed. Moreover, I'd say that the risk for faulty information processing or incorrect preconceptions is higher if the person is distracted but awake.
I'd argue that isn't remotely enough time to safely take control. You're betting your brain wakes up sufficiently in that time, and if it doesn't the consequences are potentially deadly.
>Also if I am using a tablet doing email or browsing or even playing games, 10 seconds is plenty of time to put the tablet away and grab the wheel.
That's a bit better from an alertness standpoint, but not from a situational awareness one. You're deprived of both context and situational awareness on the road.
Some key details extend far beyond a 10-15 seconds, such as: another car driving erratically, lanes ending, line of sight on pedestrians or cyclists visible prior that are now occluded by traffic. The list goes on.