Flooded roadways — Iowa Permit Test
Flooded roadways on the Iowa permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
As little as 6 inches of moving water may sweep away a vehicle, including SUVs and pickups.
Moving water pushes hard and can float a car off the road. Big trucks and SUVs are not safe from it either.
As little as 6 inches of water may sweep away a vehicle, including SUVs and pickups.
Never drive through a flooded road or bridge; turn around and find a different route.
You cannot see what is under the water. The road beneath may be washed out, and your car could drop in or be carried away.
Never drive through a flooded road or bridge.
If your vehicle stalls in floodwater, do not stay in it; leave the vehicle and move to higher ground.
Rising water can trap you or carry the car away. Getting out early and climbing up is safer than waiting inside.
If your vehicle is stalled in floodwater, abandon the vehicle and move to higher ground.
If your car is swept into water and sinks, stay calm and wait for it to fill with water; once it is full the doors are easier to open.
Water pressing on the outside holds the doors shut. When the inside fills up, the pressure evens out and the door will open.
Wait for the vehicle to fill with water.
On the test
How much moving water may be enough to sweep away a vehicle?
As little as 6 inches. Moving water pushes hard and can float a car off the road. Big trucks and SUVs are not safe from it either. Iowa Driver's License Manual, p.60: “As little as 6 inches of water may sweep away a vehicle, including SUVs and pickups.”
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.
- Free to start: a 10-question test and the first section of cards. No sign-up and no account.
- Paying opens the rest of the cards, unlimited full-length practice tests, and retests built from exactly the questions you got wrong.
- Every level up to Prepared — 3 tests passed in a row.
- Do the work, fail the real exam, and we refund you.
Where these come from
Every rule here is checked against Iowa Driver's License Manual, published by the Iowa Department of Transportation, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/IA.pdf (Iowa Driver's License Manual, edition M1170 07/23/2026, Iowa Department of Transportation, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/IA.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- https://iowadot.gov/drivers-licenses-ids/driver-education/manuals-practice-tests/drivers-manual
- https://iowadot.gov/drivers-licenses-ids/driver-education/online-permit-test-skip-trip (read 2026-10-04; states no count or mark)
- https://iowadot.gov/drivers-licenses-ids/get-or-renew-drivers-licenses-ids-permits/under-18-permit-license-or-id/instruction-permit-under-age-18 (read 2026-10-04; states no count or mark)
- https://iowadot.gov/drivers-licenses-ids/driver-education/manuals-practice-tests/take-practice-test (read 2026-10-04; its 25 questions and 80% describe the practice test and are not used)
- https://www.legis.iowa.gov/docs/iac/chapter/761.604.pdf (IAC 10/1/25; 761-604.9(1): "will declare the minimum passing score for each test")
- docs/plans/iowa-exam-shape.md (every official source checked for the exam's shape, and what each gave)