To maintain a good “space cushion” between your vehicle and the one ahead, you should use the:
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“Space cushion” rule.
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Two-second rule.
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“Safe distance” rule.
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Three-second rule.
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Explanation
The two-second rule means you should keep at least a two-second gap between your vehicle and the one ahead as a 'space cushion.' Having enough room in front of your vehicle allows you to stop safely if the vehicle in front brakes suddenly. In bad weather, poor road conditions, or when following large trucks, it’s best to increase your following distance.
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Other questions in the same category: Safe Following Distances
The “four-second rule” refers to how drivers should:To keep the driver behind you at a safe distance you should:Drivers should allow an extra cushion of space when following:You should allow a four-second or more cushion when:Drivers should increase their following distance:To safely stop in emergencies always allow a space cushion of at least:Drivers should always keep a minimum following distance of:You should increase your following distance:Allow extra space in front of your vehicle when following a:It is best to keep a space cushion:
This question appears in the following DMV practice tests: