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[quote user="BroadwayLion"] [quote user="Bucyrus"]But I associate sleep with a complete suspension of cognitive or conscious action, so I don't know if it is technically possible to reset the alerter while fully asleep.[/quote] This is not about what you associate with sleep. It is a matter of being impaired while operating the locomotive. Sleep or even drowsiness is an impairment to safe operation. Tired people are subject to "Micro-Bursts of Sleep" as long as ten seconds or so. These can be dangerous, because you may not know that you are having them. [/quote] Yes, I understand, but my statement that you said was "not so" was a statement about sleep.  It was not about being drowsy or tired.  I said this: "Therefore, if the engineer of the striking train collided with the train ahead because he was asleep, he had 1 minute 11 seconds to fall asleep." I only made the statement in response to the question posed as to how someone could fall asleep so fast after making a conscious decision to change the throttle setting.  My only point was to clarify exactly how much time was available to fall asleep.
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