Drivers should maintain a two-second safe following distance when driving at:
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Any speed.
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Speeds up to 55 MPH.
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Speeds up to 30 MPH.
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Explanation
To share the road safely, always maintain at least a two-second following distance from the vehicle in front of you. This rule applies at any speed under normal driving conditions on state roads and U.S. highways. However, you should increase your following distance to at least four seconds in poor weather, low-light conditions, or when driving larger vehicles that take longer to stop. Leaving extra space gives you more time to react and helps prevent rear-end collisions.
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Other questions in the same category: Safe Following Distances
When should you increase your following distance?Allow a larger space cushion when stopping:A safe following distance when driving in normal conditions at speeds of 30 mph or slower is:Allow extra space when following:You should increase your following distance:To keep the driver behind you at a safe distance you should:To give yourself a 3 to 4 second following distance from the vehicle ahead of you:When following other vehicles, maintain a space cushion of at least:Most rear-end collisions are caused by the vehicle in the back following too closely.
Drivers should keep a minimum following distance of:
This question appears in the following DMV practice tests: