WEBVTT

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Two in the afternoon. In the car park at the edge of the village, only one space is still in the shade.

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Ten minutes of sleep here is not lost time: you drive on more awake.

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Five, ten, twenty, thirty minutes of sleep: a laboratory study compared them.

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Five isn't enough. Twenty and thirty help, but later: thirty leave you groggy first.

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Ten work at once, and partly for over two hours. They fit into a quarter-hour stop.

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At the first signs of sleepiness, pull over. Ten minutes of sleep, a fifteen-minute alarm.