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Five in the afternoon. On the Simplon road the drive home begins. Everyone is coming off a full day.

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The drive is short and you know it by heart. It looks like the easiest part of the day.

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A thousand kilometres of real motorway: on little sleep, 535 lane departures. After a normal night, 66.

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Sleepiness predicted the mistakes. Feeling worn out didn't. They are two different things.

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They had been awake for eight hours and the drives were brief. One short night's sleep had been enough.

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The sleep you lost is what makes you drift. Sleep before the next drive.