If you are driving at 30 mph or less, a minimum following the time of 2-3 seconds should be used.
The three-second rule states that you should give the car in front of you some room. Watch for the leading vehicle to pass a mile marker, roadside sign, or another landmark to estimate the distance between your car and the one in front of you.
The 3-second rule takes into account your speed as well as the distance that the vehicle in front of you needs to stop completely. The rule offers you a tiny bit of extra time in case they suddenly apply the brakes.
Learn more about seconds here:
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