Practice question

Safe following distance for a heavy commercial vehicle traveling under 40 mph is generally:

  1. 1 second per 10 feet of vehicle length
  2. 1 second per 10 feet of vehicle length, plus 1 second for speeds over 40 mph
  3. 2 car lengths
  4. Touching the bumper of the vehicle ahead

Answer: B — 1 second per 10 feet of vehicle length, plus 1 second for speeds over 40 mph

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