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A good rule of thumb is to keep a distance of one car length, about 10 feet, for every 10 mph of speed, so at 40 mph, you should be 40 feet behind the car in front of you. Obviously, this is harder to do in heavy traffic.

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14y ago
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ron.dossett@btintern...

Lvl 2
3y ago

20 yards

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Q: If you are driving at 40 mph what should be the distance between cars?
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