District of Columbia Permit Test Study Guide (2026)

Cover every topic on the District of Columbia DMV permit test, ranked by how often they show up on the real exam.

The DC DMV Automobile Driver Manual is the only official study source for the knowledge test. The manual is available as a flipbook and PDF on dmv.dc.gov. It covers DC traffic laws, road signs, safe driving habits, and special DC rules like bike lane priority and pedestrian right-of-way.

District of Columbia Speed Limits

Speed limits are one of the most-tested topics on the DC permit exam, and the questions usually test the District's statutory default limits -- what the speed is when no sign is posted. DC's defaults are 20 mph on streets and highways generally, 15 mph in alleys, and 15 mph on streets adjacent to a school during posted hours (or during recess/arrival/dismissal if no times are posted). Always obey the basic-speed law: never drive faster than is safe for current conditions.

Alcohol & BAC Limits

Expect at least one alcohol question on the DC permit test. Memorize the three BAC thresholds: 0.08% is the legal limit for drivers age 21 and older, 0.04% is the limit for anyone driving with a commercial driver license (CDL), and the District's zero-tolerance threshold for drivers under 21 is 0.02% -- any measurable amount of alcohol. A BAC of 0.08% or higher brings full adult DUI charges (D.C. Code 50-2206.11), which can mean a $1,000 fine and up to 180 days in jail on a first offense.

Right-of-Way Rules

Right-of-way is the single most-missed topic across every state's permit test. The rules are simple once you memorize them. At a 4-way stop, the first vehicle to fully stop goes first; if two arrive together, the driver on the right has the right of way. At an uncontrolled intersection, yield to any vehicle already in the intersection and to the driver on your right. At roundabouts, yield to traffic already circulating and enter only when there is a safe gap. Always yield to pedestrians in any crosswalk, marked or unmarked, and to emergency vehicles with lights and sirens — pull right and stop. When turning left across oncoming traffic, you must yield to oncoming vehicles. Yield does not give you the right of way; it requires you to give it up.

Following Distance & Safety

DC's driver manual recommends a standard 3-to-4-second following distance: pick a fixed point on the road, wait for the vehicle ahead of you to pass it, then count one-thousand-one, one-thousand-two, one-thousand-three. Increase that to 4 or 5 seconds in rain, snow, or ice.

Road Sign Colors & Shapes

Road signs on the DC permit test follow the federal Manual on Uniform Traffic Control Devices, so shapes and colors are consistent across the country. Memorize the shapes first: octagon always means stop, downward triangle means yield, diamond means warning, pentagon marks a school zone, round warns of a railroad crossing, and horizontal rectangle is a guide sign. Then learn the colors: red is stop or prohibition, yellow is general warning, orange is construction, green is directions and exits, blue is driver services, brown is recreation, and fluorescent yellow-green is for schools and pedestrians. Practice identifying signs by shape and color alone — see the full visual cheat sheet on our District of Columbia road-signs page.

Key District of Columbia Numbers to Memorize

If you only remember a handful of facts going into the test, make it these. Every one of them maps to questions that have appeared on the real DC exam.

Parking Rules

Parking questions on the District of Columbia permit test cover two patterns everywhere. For parallel parking, your wheels should be no more than 12 inches from the curb. For hill parking, the kerb rule decides which way your front wheels point: facing downhill (with or without a curb), turn the wheels toward the curb; facing uphill with a curb, turn the wheels away from the curb so they rest against it; facing uphill with no curb, turn the wheels toward the edge of the road. Always set the parking brake and leave the car in park (or in low gear with a manual).

DC's no-parking zones (18 DCMR 2405) you must memorize: within 10 feet of a fire hydrant, within 20 feet of a marked crosswalk, within 30 feet of a stop sign, and within 50 feet of a railroad crossing.

GDL Restrictions (DC)

DC's learner permit: log 40 hours of supervised driving, including 10 at night, with a supervisor who is 21 or older and holds a valid full license, seated beside you. You can't drive with any passenger besides your supervisor, use a cell phone, or drive between 9 p.m. and 6 a.m. on the permit. At 16 and a half, after 6 permit months with a clean record, apply for a provisional license: siblings and your supervising adult are the only passengers allowed. Once fully licensed, DC's curfew for all drivers under 18 runs 11 p.m.-6 a.m. Sunday-Thursday and 12:01 a.m.-6 a.m. on weekends, with no more than 2 passengers under 21 (siblings excluded). Expect 1-3 GDL questions on the DC exam.

DUI & Drug Laws

DUI questions go beyond the BAC limits in Section 2. Three concepts you must know: implied consent means refusing a chemical test triggers automatic license suspension on top of any DUI charge. Prescription and over-the-counter drugs can also impair driving — antihistamines, sleep aids, painkillers, and some cold medicines list "do not operate heavy machinery" warnings, and driving impaired by them is a DUI even if you have a valid prescription. Marijuana — even where state-legal — is treated like alcohol for driving: any detectable impairment can result in a DUI, and edibles can take 1–3 hours to peak. The only safe BAC and the only safe THC level for driving is zero. There is no quick way to sober up; only time will lower your BAC.

Now Test What You've Studied

Five questions pulled at random from our District of Columbia question bank — a mix of road signs, traffic laws, and right-of-way. Answer to see the correct choice and a short explanation. For a full timed exam, take the free practice test.

District of Columbia Study Guide FAQ