Flooded roads — District of Columbia Permit Test
Flooded roads on the District of Columbia permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Do not drive through flooded areas; if you see a flooded roadway ahead, turn around and find another route.
Water can hide dips or a washed-out road surface, so a road that looks shallow may not be there at all.
If you see a flooded roadway ahead, turn around and find another route to get to your destination.
As little as 6 inches of water reaching the bottom of a vehicle may cause loss of control or stalling.
Even shallow water pushes on the car and can float the tires off the road or flood the engine.
If six inches of water reaches the bottom of a vehicle, it may cause loss of control or possible stalling.
2 feet of moving water can carry away most vehicles, including SUVs and pickup trucks.
Moving water pushes hard on a car's side, and a big vehicle is not heavy enough to stay put.
Two feet of moving water can carry away most vehicles including sports utility vehicles and pickup trucks.
If there is no other route around a flood, go to higher ground and wait for the water to go down.
Waiting a few hours on high ground is safer than gambling that the road under the water is still there.
If there is no other route, proceed to higher ground and wait for the water to subside.
On the test
What should you do if you see a flooded road ahead?
Turn back and reroute. Water can hide dips or a washed-out road surface, so a road that looks shallow may not be there at all. DC Driver Manual, p.35: “If you see a flooded roadway ahead, turn around and find another route to get to your destination.”
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)