How much distance should you keep when following vehicles that often stops on the roadway such as, school buses, delivery vans, etc.?

• 1-2 seconds
• 2-3 seconds
• 4-5 seconds
  Explanation:

  "When you are following vehicles that stop often (buses, delivery vans), you should increase the distance between your vehicle and the one ahead of you to four or five seconds, and possibly more as needed."
• 6-7 seconds