Following distance three second — Louisiana Permit Test
Following distance three second on the Louisiana permit test — 3 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Use the 3-second rule to keep a safe following distance; it works at any speed.
Most people judge distance poorly, but counting seconds works the same in town and on the highway.
Since most people have trouble judging distances, the “3-second rule” makes it easier for you. You can use it at any speed.
To use the three-second rule, pick an object ahead and start counting when the vehicle in front passes it.
A fixed point like a sign or pole gives you a fair start line for counting.
Choose some object ahead of the vehicle in front of you, such as a sign, pole or a tree.
If you reach the checkpoint in less than three seconds, you are following too closely; drop back and count again.
Getting there early means you would not have time to stop if the car ahead braked hard.
If it takes less than three (3) seconds for your car to pass the checkpoint, you are following too closely.
On the test
What following distance does the manual's basic rule call for?
3 seconds. Most people judge distance poorly, but counting seconds works the same in town and on the highway. Class D & E Driver's Guide, p.65: “Since most people have trouble judging distances, the “3-second rule” makes it easier for you. You can use it at any speed.”
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 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.")