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Minnesota Class D Knowledge Practice Test
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Passing target: 80% (24/30)
Observation, Speed & SpaceStandalone practice
The road is dry and traffic is light. The car ahead passes a road sign, and you start to count. Your front bumper reaches the same sign when you say "one-thousand-two." What does this tell you?
A follows B on a dry road in light traffic. The card states the given two-second count at a fixed roadside sign.
Correct answer: You are too close, so slow down gently until the count reaches three
Why
A gap in seconds grows as your speed grows, so the same count works at any speed. Your brakes start to work only after you see a problem and move your foot, and that takes time. The three-second count is for a standard car in ideal conditions; leave more time when conditions are poor.
Verified against Minnesota Driver's Manual · Three-Second Rule · p. 76
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