Applies in all 50 states Rules of the Road

What does the 3-second rule for following distance mean?

By DMV Master Editorial Team Updated Verified against US DMV standard (applies in all states)
A

You must stop for 3 seconds at every stop sign

Review the explanation below for the correct reasoning.

B

You should stay at least 3 car lengths behind the vehicle ahead

Review the explanation below for the correct reasoning.

C

After the vehicle ahead passes a fixed point, at least 3 seconds should pass before you reach that same point

Correct answer

D

You should check your mirrors every 3 seconds

Review the explanation below for the correct reasoning.

Detailed Explanation

The 3-second rule means: when the vehicle ahead passes a fixed point (like a sign), count 3 seconds before you reach that same point. This ensures a safe following distance. Increase to 4-6 seconds in bad weather.

Source: US DMV standard (applies in all states)

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