CDL · Following distance

A truck pulling double trailers is 100 feet long and moving at 30 mph. The pavement is dry and you can see well. At minimum, how many seconds of following space should you leave?

Correct answer: 10 seconds.

Answer options

  1. A9 seconds
  2. B11 seconds
  3. C10 seconds Correct

Why

Below 40 mph, the rule is one second of gap per 10 feet of rig length, so this 100-foot combination needs 10 seconds; the additional second applies only when going faster than 40 mph.

About this question

Topic: Following distance   License: CDL

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Where it applies: Asked in every state.

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This question is part of Pulling Doubles and Triples (24 questions). Take the full set and check your score.

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