So does being married, exercising, eating right, driving safely, and keeping stress levels down.

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Given the amount of information being thrown at motorists, such a system could help take some of the stress out of driving.

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"I don't miss the red-eye flights or putting on pantyhose or the stress of not being within driving distance of my 20-month-old son, "says Ren Shimada Siegel, a former Novell marketing manager who now runs a placement agency from her home.

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The app helps drivers to arrive stress-free and on time with spoken directions and a unique combination of advanced driving guidance.

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Of his immediate predecessors, one had left after four months because the job was driving her to a nervous collapse, and another developed breast cancer in part, she believes, because of the stress involved.

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