RRoad Rules Prep
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District of Columbia Vehicle Control practice

Practice 48 District of Columbia DMV questions on vehicle control. Answer interactively below with an instant explanation after every question.

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Example questions & answers

1

What is it called when a vehicle's tires ride on a layer of water on the road?

  • A.tailgating.
  • B.weaving.
  • C.hydroplaning.✓
  • D.highway hypnosis.

Why: Hydroplaning occurs when your tires lose contact with the road and ride on a thin layer of water. This typically happens at higher speeds during heavy rain.

2

Which rule should you use to maintain a safe following distance from the vehicle in front of you?

  • A.two-second
  • B.three-second
  • C.five-second
  • D.four-second✓

Why: Use the four-second rule to maintain a safe following distance from the vehicle ahead. This buffer provides enough time to react and stop safely if the lead driver brakes suddenly.

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Practice material only — verify current rules with the DC Department of Motor Vehicles.