Headlight failure — District of Columbia Permit Test
Headlight failure on the District of Columbia permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
If your headlights fail on a lighted highway, get off the roadway onto the shoulder or other space as rapidly and safely as possible.
Without headlights other drivers cannot see you well, so the sooner you are out of the lane the better.
If the highway is lighted, get off the roadway onto the shoulder or other available space as rapidly and safely as possible.
If your headlights fail on a dark highway, try your parking lights, directional signals or emergency flashers and get off the roadway.
Any light you can make lets others see you and lets you see enough to get off the road.
If the highway is dark, try your parking lights, your directional signals, or your emergency flashers and get off the roadway.
If all your lights fail, stay on the roadway and slow down enough to pull off it safely.
Swerving off blind at speed can put you into a ditch or a pole; slowing first lets you find the edge safely.
If all lights fail, stay on the roadway and slow down enough to pull off the roadway safely.
On the test
Your headlights fail on a lighted highway. What should you do?
Get onto the shoulder quickly. Without headlights other drivers cannot see you well, so the sooner you are out of the lane the better. DC Driver Manual, p.55: “If the highway is lighted, get off the roadway onto the shoulder or other available space as rapidly and safely as possible.”
How this works
Most practice tests hand you a bank of questions and leave the manual somewhere else. This one puts them together.
You read one law and the reason behind it, then answer a question on that law while it is still fresh. Get it right and you move on; get it wrong and you have found the gap while it is cheap to fix, not on the morning of the exam.
Learning one rule at a time, and proving it immediately, is what turns a manual you skimmed into something you actually know — and it makes studying feel like getting somewhere rather than like waiting to find out.
What it costs
- One payment, once — not a subscription. Nothing renews and there is nothing to cancel, for an exam you sit one time.
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- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
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- Do the work, fail the real exam, and we refund you.
All District of Columbia permit topics
Where these come from
Every rule here is checked against DC Driver Manual, published by the District of Columbia Department of Motor Vehicles, and against the state code itself. Last checked 2026-10-05.
- src/assets/drivers-manuals/DC.pdf (DC Driver Manual (English), Rev. 7/29/2021, District of Columbia Department of Motor Vehicles, fetched 2026-10-05 from the Wayback Machine's original-bytes capture of dmv.dc.gov; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/DC.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- https://dmv.dc.gov/publication/dc-dmv-automobile-driver-manual (read 2026-10-05; links only the 2023 Issuu flipbooks)
- https://issuu.com/dcdmv/docs/dc_dmv_driver_manual_english_revised_final (the current 2023 edition, read 2026-10-05 from its public page images to diff against the pinned edition; not pinnable)
- https://dmv.dc.gov/service/knowledge-tests (read 2026-10-05; states no count or mark for the knowledge test)
- https://dcregs.dc.gov/Common/DCMR/RuleList.aspx?ChapterNum=18-1 (18 DCMR chapter 1, sections 100-114, read 2026-10-05; section 104 sets what the examination covers and states no figure)
- https://code.dccouncil.gov/us/dc/council/code/sections/50-1401.01 (D.C. Code 50-1401.01, read 2026-10-05; requires a knowledge examination and states no figure)