Drivers should keep a minimum following distance of:
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two seconds, with an additional second for any vehicle in front of them.
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one second, with an additional second when approaching an intersection.
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55 milliseconds, with an additional millisecond for every drop of rain in a 2 miles radius.
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four seconds during favorable weather and traffic conditions.
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Explanation
Rear-end collisions are almost always caused by drivers following too closely. Drivers should keep a minimum following distance of four seconds during normal weather and traffic conditions. They must increase this distance if the weather or traffic conditions worsen. Maintaining a large enough following distance helps avoid collisions, because it allows drivers to have more time to react to sudden hazards.
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Other questions in the same category: Safe Following Distances
Drivers should allow a larger space cushion when stopping:You should increase your following distance when:When should you increase the distance between your vehicle and the vehicle ahead of you?To safely stop in emergencies always allow a space cushion of at least:You should allow for more space between you and the vehicle ahead when:
The ten-second rule helps the driver determine a safe following distance.You need extra following distance when:Drivers should allow an extra cushion of space when following:If you see a distracted driver, you should maintain a safe following distance of:Which of the following statements about safe following distance is true?
This question appears in the following DMV practice tests: