Fascinating and creepy: The surveillance tech on the bridge attempts to detect sleepy drivers so "yawn three times and the authorities will be alerted". [OP]
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That’s not the most efficient heuristic, however. The best predictor before people crash is a motion of one trying to keep their eyes open, basically with their face opening up.
Source: I know people working on automated machinery to detect this in pilots.
Even if yawning and face opening are predictors of a sleep crash, given that they are both methods people use to help keep themselves awake, does creating an environment where drivers feel they are not allowed to perform them actually lead to fewer accidents?