DMV practice test: rules of the road explained
The written permit test checks that you know traffic signs, right-of-way rules, safe driving habits and the effects of alcohol and drugs. These practice questions focus on rules that are the same, or nearly the same, in most states, and each answer is explained so you understand why.
How the written test works
Each state sets its own number of questions and passing mark, so check your state’s driver handbook. Typical tests have about 20 to 50 multiple-choice questions and require a score somewhere between 70% and 85%. Many states also test road signs with images.
Road sign colors and shapes
- Red: stop, yield or prohibition
- Yellow: warning (diamond shape is the most common)
- Orange: construction and temporary work zones
- Green: directions and distances
- Blue: motorist services such as fuel and food
- Brown: parks and recreational areas
- Octagon: stop only; pennant: no-passing zone; round: railroad crossing ahead
Right-of-way rules that appear again and again
- At a four-way stop, the first vehicle to arrive goes first; if two arrive together, the driver on the right goes first.
- When turning left on a plain green light, yield to oncoming traffic and pedestrians.
- In a roundabout, yield to vehicles already in the circle.
- Pedestrians in a crosswalk have the right of way.
- Stop for school buses with flashing red lights on an undivided road, in both directions.
Stopping distance and safe following
Stopping distance is your perception distance, plus reaction distance, plus braking distance. Speed matters a great deal: doubling your speed roughly quadruples your braking distance. In good conditions, keep at least a three-second gap behind the vehicle ahead, and add time in rain, fog or at night.
Alcohol, drugs and distraction
The legal blood alcohol limit for drivers 21 and over is 0.08% in nearly every state, but impairment begins earlier. Drivers under 21 face zero-tolerance laws. Phones, passengers, food and fatigue all take attention off the road, and the safest policy is to remove the temptation before you drive.
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Frequently asked questions
How many questions are on the DMV written test?
It depends on the state, but usually between 20 and 50. Check your state’s handbook for the exact number and passing score.
Do these questions match my state’s test?
They cover general rules found in most states. Always study your state’s official driver handbook, because speed limits, fines and some signals differ.
What is the best way to pass the permit test?
Read your state handbook, then take practice quizzes and review every explanation. Re-take sets that contain questions you missed.
What happens if I fail the permit test?
Most states let you retake it after a short wait or a fee. The rules vary, so check your local DMV.
WKQuiz is not affiliated with any state DMV or government agency. Traffic laws vary by state: use your state driver handbook as the official source, and treat these questions as practice.