Posted speed limits — Louisiana Permit Test
Posted speed limits on the Louisiana permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
You must not drive slower than a posted minimum speed limit.
Very slow cars on a fast road make others brake hard or swerve, which leads to rear-end crashes.
You must not drive slower than the posted minimum limit.
In Louisiana, minimum speeds are posted on interstates.
Interstate traffic moves fast, so a car crawling along is a danger to everyone behind it.
Minimum speeds are posted for our interstates.
Driving too slowly is dangerous because impatient drivers take needless chances to get around you.
A driver stuck behind a slow car may pass in a bad spot. Keeping up with traffic helps stop that.
Drivers tend to get impatient with another driver who is driving too slowly and take unnecessary chances to get around him or her.
Reduced speed limits apply near schools and playgrounds and at school crossing signs when children are present.
Children can dart into the road without looking. A lower speed gives you time to stop.
On streets near schools and playgrounds and at locations marked with a “school crossing” sign when children are present.
Reduced speed limits are also required on streets in residential or business areas.
Homes and shops mean people walking, cars backing out and doors opening, so you need more time to react.
On streets in residential or business areas.
On the test
What is true of a posted minimum speed limit?
You must not drive slower than it. Very slow cars on a fast road make others brake hard or swerve, which leads to rear-end crashes. Class D & E Driver's Guide, p.87: “You must not drive slower than the posted minimum limit.”
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 Class D & E Driver's Guide, published by the Louisiana Department of Public Safety, and against the state code itself. Last checked 2026-10-04.
- src/assets/drivers-manuals/LA.pdf (Class D & E Driver's Guide, DPSMV2052 (R08/25), Louisiana Office of Motor Vehicles, retrieved 2026-09-14; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/LA.pages.txt (the plain pdftotext fixture every citation here was cut from and verified against; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/LA-exam.html (the OMV's Permits page, https://expresslane.la.gov/omv/drivers/personal-driver-s-licenses/permits/, archived 2026-10-04; the 40-question count)
- https://expresslane.la.gov/omv/resources/driver-manuals/
- https://expresslane.la.gov/omv/drivers/personal-driver-s-licenses/new-licenses/ (read 2026-10-04; "An 80% is the minimum passing score for the knowledge test.")