Large truck wide right turns — Iowa Permit Test
Large truck wide right turns on the Iowa permit test — 2 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A truck driver sometimes needs to swing wide to the left to make a right turn.
A long trailer cuts the corner as it turns. The driver moves left first so the back wheels clear the curb, which can look like a left turn.
Truck drivers sometimes need to swing widely to the left in order to safely negotiate a right turn.
Do not cut in between a turning truck and the curb; watch the truck's signals and give it plenty of room.
A truck turning right cannot see a car that slips into the gap on its right. That gap closes as the trailer swings in.
Cutting in between the truck and the curb increase the possibility of a crash.
On the test
A truck with its right turn signal on moves left before the intersection. What is the driver most likely doing?
Swinging wide to make a right turn. A long trailer cuts the corner as it turns. The driver moves left first so the back wheels clear the curb, which can look like a left turn. Iowa Driver's License Manual, p.57: “Truck drivers sometimes need to swing widely to the left in order to safely negotiate a right turn.”
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.
- 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)