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After chatting with some sailors about their watch schedule (the group happened to do 4 hours on, 12 hours off), it got me to wondering if there is an optimal way to split up driving long distances between two or more people.

For example, if my wife and I had ten hours of driving in front of us, is there a way to split the driving that is the safest and least fatigue-inducing? Perhaps we each take 2.5-hour shifts. Or we could each drive five hours straight.

Since this is kind of a vague question, I'm looking for answers supported by recommendations from groups (maybe a long-haul tandem truck driving group?) or scientific research that would be a general answer for a group wanting to split driving responsibilities.

closed as primarily opinion-based by Ali Awan, Giorgio, Mark Mayo Mar 23 '18 at 0:18

Many good questions generate some degree of opinion based on expert experience, but answers to this question will tend to be almost entirely based on opinions, rather than facts, references, or specific expertise. If this question can be reworded to fit the rules in the help center, please edit the question.

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    Get another couple involved so you can do four hours on, twelve hours off. But surely the problem is different depending on the length of the drive (50 hours vs. 10, for example) and on whether you plan to drive around the clock or to stop at night. – phoog Mar 22 '18 at 21:02

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