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
- A9 seconds
- B11 seconds
- 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.
Practice Pulling Doubles and TriplesMore questions from Pulling Doubles and Triples
- When you pull doubles or triples, why is it important to look farther ahead than usual?
- Pulling a set of doubles, you have to brake hard to keep from hitting something. Which braking method should you use?
- If you pull doubles or triples, which of the following is accurate?
- How does the rollover risk of doubles and triples compare with that of single-trailer rigs?
- A typical triple-trailer rig is a tractor pulling three semitrailers joined by two converter dollies. How many pivot (articulation) points does it have?
- What kind of parking space is best for a set of doubles or triples?
- You are pulling doubles and the trailer wheels begin to skid. What is the most likely result?
- Which unit is most likely to roll over because of the crack-the-whip effect?
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