CDL · Following distance

Your 100-foot double-trailer rig is traveling 50 mph on a dry road and visibility is good. What is the smallest following gap, in seconds, you should leave behind the vehicle ahead?

Correct answer: 11 seconds.

Answer options

  1. A11 seconds Correct
  2. B10 seconds
  3. C9 seconds

Why

Begin with one second for each 10 feet of vehicle length, which comes to 10 seconds for this rig, and then add a second because you are going faster than 40 mph, for a total of 11.

About this question

Topic: Following distance   License: CDL

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Where it applies: Asked in every state.

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