CDL · Speed
Regarding the distance needed to bring a vehicle to a stop, which statement is correct?
Correct answer: Wet pavement can double your stopping distance, no matter how fast you are going.
Answer options
- APavement conditions have almost no effect on how far you travel before stopping.
- BWet pavement can double your stopping distance, no matter how fast you are going. Correct
- CAt 40 mph you need about twice the distance you need at 20 mph.
Why
Water on the road cuts traction, which can double the distance needed to stop. Speed has an even bigger effect: when you double your speed, you need about four times as much distance to stop, not twice as much.
About this question
Topic: Speed License: CDL
Part of these practice sets:
Where it applies: Asked in every state.
Practice the whole set
This question is part of Slippery Roads and Hydroplaning (20 questions). Take the full set and check your score.
Practice Slippery Roads and HydroplaningMore questions from Slippery Roads and Hydroplaning
- Hydroplaning is most likely where water has pooled on the pavement. What can warn you that water is standing on the road?
- On a slick road surface, which of these actions should you avoid?
- Which of these problems can occur when your brakes get soaked in heavy rain or deep water?
- On a cold day, the temperature climbs just enough for ice on the road to start melting. What happens to the road surface?
- What causes hydroplaning?
- If your route takes you through deep or swiftly flowing water, which of these is a mistake?
- Under what conditions should you be on the lookout for black ice?
- What should you do when driving on slippery pavement?
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