Interstate entering — Louisiana Permit Test
Interstate entering on the Louisiana permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
On a Louisiana interstate the maximum speed is 70 mph unless another limit is posted.
Above this speed a driver has less time to react, and crashes at high speed hurt people far worse.
Remember that the maximum speed allowed is 70 miles per hour unless otherwise posted.
Enter the interstate at or near the speed of the traffic already on it.
A car that joins the flow much slower than everyone else forces drivers behind it to brake hard or swerve.
Enter the interstate at or near the speed of traffic.
Do not drive slower than the posted minimum speed on the interstate unless weather or road conditions demand it.
A car going far slower than the rest is a hazard that fast traffic can run into from behind.
You should not drive slower than the posted minimum speed on the interstate unless the weather or road conditions demand slower speed.
Begin checking traffic while still on the entrance ramp, and do not creep to the end of the ramp and stop.
A car stopped at the end of a ramp has no speed to join fast traffic and may be hit from behind.
Do not move slowly to the end of the entrance ramp and stop.
When merging onto the interstate, the traffic already on the interstate has the right of way.
You cannot count on drivers already on the road to see you or move over, so it is your job to fit in.
Interstate traffic has the right of way.
On the test
Unless another limit is posted, what is the maximum speed on a Louisiana interstate?
70 mph. Above this speed a driver has less time to react, and crashes at high speed hurt people far worse. Class D & E Driver's Guide, p.100: “Remember that the maximum speed allowed is 70 miles per hour unless otherwise posted.”
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.")