District of Columbia Practice Tests for Your D.C. Driver License



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#1. A flashing yellow light means:

When approaching a flashing yellow traffic signal light you must slow down and proceed with caution.

You do not need to stop for a flashing yellow light.


#2. If you drive slower than the flow of traffic on a freeway you must:

The basic rule is to drive in the right lane and pass on the left.

Remember, when you are driving more slowly than the traffic flow on a highway that has two or more lanes in your direction, you should move to and stay in the right lane.


#3. If you encounter a flooded roadway, you should:

Do not drive through flooded areas. If you see a flooded roadway ahead, turn around and find another route to get to your destination.

Even if the water appears shallow enough to cross, do not attempt to cross a flooded road. Water can hide dips, or worse, floodwaters can damage roadways by washing away the underlying road surface.


#4. The pentagon (five-sided) shape is used for which road signs?

The pentagon (five-sided) shape warns you of school zones and marks school crossings.


#5. You approach this vehicle from behind. It is keeping an exceptionally low speed. What should you do?

A broken yellow line indicates that passing on the left is permitted when the way ahead is clear. Overtaking and passing should be done with care because of oncoming traffic.


#6. Which of the following practices is bad for your fuel economy?

By driving carefully, you will get better gas mileage and save money on fuel. Accelerate gradually. Drive smoothly and at moderate speeds. Anticipate stops to minimize hard braking. Avoid unnecessary driving. Combine trips and carpool when possible.


#7. When turning left from a two-way street onto a one-way street, you should complete the turn in:

When making a left turn into a one-way street, get into the left lane well ahead of the turn. Turn sharply into the left lane.

Remember to turn from the lane that is closest to the direction of travel and turn into the lane closest to the lane from which the turn is initiated.


#8. When should you use your horn?

You may use your horn when reasonably necessary to ensure safe operation. Sound your horn only to warn a pedestrian or the driver of another vehicle of your presence and to avoid accidents.

The horn is not intended to take the place of brakes.

Do not use your horn to alert a bicyclist of your approach in a non-emergency situation. A loud horn can cause a bicyclist to lose control.

Do not use your horn at a blind pedestrian or around horses.


#9. This is an example of:

Traffic signal ahead is an example of a warning sign.


#10. You take away your own cushion of safety:

Tailgating a truck or car is dangerous because you take away your own cushion of safety if the vehicle in front of you stops short.


#11. What is the main cause of car skids?

Skids are mainly caused by drivers traveling too fast for conditions. The best policy is to keep a skid from happening. Slow down to a speed at which you can control the car.


#12. If you are involved in a traffic crash and someone is injured, you must always:

You must render assistance to any person injured in the accident. Depending upon the extent of the injury, assistance in most instances is accomplished by calling for an ambulance. Normally, you should not attempt to move a person who is unconscious or seriously hurt. Do not give an injured person anything to drink.


#13. Which of the following may result in a suspension of your driver license and vehicle registration?

Your driver license and vehicle registration can be suspended for failure to pay child support.


#14. Wearing earplugs in both ears while driving:

A person may not wear earplugs, a headset, or earphones attached to a radio, tape player, CD player or other audio device while driving a motor vehicle.

Use of earphones or earplugs for cellular phones are acceptable.

Hearing aid devices are also acceptable.


#15. During a rainfall, when are road pavements usually most hazardous?

The first half hour of rain is the most hazardous. Be especially careful at the beginning of a light rain. The mixture of oil and water on the pavement is particularly dangerous. The oils and other vehicle fluids have not been washed away yet as they would after a rain of several hours.


#16. Which of the following has always the right-of-way at a railroad crossing?

Trains have the right of way 100 percent of the time, over ambulances, fire engines, cars, the police, and pedestrians.


#17. What does this sign mean?

Divided highway ahead (divided highway begins).

The highway ahead is divided into two one-way roadways. Keep to the right.


#18. If you need to use arm signals, how would you signal a right turn?

Right turn – left arm extended, with elbow bent upward, at about a 90-degree angle.


#19. For an immediate right turn in a roundabout with multiple lanes, you should:

For a right turn, choose the right-hand lane and exit in the right-hand lane. (Blue car)


#20. What is the three-to-four-second rule?

The best way to assure proper following distance is to use the three-to-four second rule. In many situations you may need more following distance to be safe.

Remember, a four-second following distance does not mean that you are able to stop within four seconds.


#21. When a school bus with flashing red lights is stopped on the other side of an undivided roadway with two lanes, you must

When a school vehicle is stopping or has stopped on the roadway, and is operating the alternating flashing red lights, all vehicles must stop at least 20 feet from the front or rear of the school vehicle. No one can proceed until the alternating flashing red lights have been turned off.

Drivers on the other side of a divided highway are not required to stop.


#22. What does this sign mean?

Keep Left. An obstruction or traffic island where traffic must keep left is ahead.


#23. What does this sign mean?

Merging traffic sign.

Merging traffic from the right is just ahead.


#24. When parking at a railroad crossing, you must keep this following distance from the crossing:

Parking is not allowed within 50 feet of the nearest rail of a railroad crossing.


#25. Which is one factor that greatly affects your stopping distance?

Your actual stopping distance will depend upon many factors, including:

  • Your perception and reaction time.
  • Type and condition of the pavement.
  • Percentage of grade of roadway.
  • Kind and condition of tire treads.
  • Vehicle design and condition of shock absorbers.
  • Type and condition of brakes.
  • Direction and speed of the wind.

Note: a posted speed limit does not affect the stopping distance, only your actual speed does. Speed limits do not tell you at what speed you should drive. They only say you cannot go faster than the speed shown.

See result

The Standard Non-Commercial License Practice Test

The standard knowledge test has 25 questions. This is the test DMV gives you if you are 20 years or older and not part of the Gradual Rearing of Adult Drivers (GRAD) program.

The GRAD program is designed for novice drivers (16 – 20 years of age) to safely gain driving experience before obtaining full driving privileges.

To practice for the written knowledge test if you are under 21 years, you should go here: DMV Practice Tests for Your GRAD Permit

What You Should Know about the D.C. Driver Knowledge Tests

Things you should know about your D.C. Driver License test:

Number of Questions: 25 (standard non-commercial)
30 (GRAD or Learner Permit Knowledge)
Correct answers needed: 20 (standard non-commercial)
24 (GRAD or Learner Permit Knowledge)
Passing score: 80 percent
Time limit: 60 minutes (standard non-commercial)
75 minutes (GRAD or Learner Permit Knowledge)
Earliest retest upon failure: 4 days
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