Speed signs — District of Columbia Permit Test
Speed signs on the District of Columbia permit test — 2 rules, each with the reason behind it and a question on it while it is fresh.
The rules
An advisory speed sign does not have the force of law, but if you exceed it and have a crash, you may be found to have violated the general speed restriction and be ticketed.
The advisory speed marks a curve or ramp where going faster can throw you off the road, whatever the posted limit says.
Although an advisory speed sign does not have the force of law, if you exceed it and have a crash, it may be concluded that you violated the general speed restriction and may be subject to a ticket.
Advisory speed signs have black letters on a yellow or orange background, often under a warning sign, and warn that conditions may make it unsafe to drive faster.
A sharp curve or a ramp can be unsafe at the posted limit, and the advisory sign tells you how much to slow down.
Advisory speed signs are posted along portions of highways to warn you that conditions may often make it unsafe to drive faster.
On the test
What can happen if you exceed an advisory speed and then crash?
You may be ticketed for unsafe speed. The advisory speed marks a curve or ramp where going faster can throw you off the road, whatever the posted limit says. DC Driver Manual, p.80: “Although an advisory speed sign does not have the force of law, if you exceed it and have a crash, it may be concluded that you violated the general speed restriction and may be subject to a ticket.”
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
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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)