Night driving — Louisiana Permit Test
Night driving on the Louisiana permit test — 9 rules, each with the reason behind it and a question on it while it is fresh.
The rules
At night you must be able to stop within the distance you can see ahead with your headlights.
If you drive faster than your lights reach, something in the road shows up too late to stop for.
When driving at night, you must be able to stop within the distance you can see ahead with your headlights.
Low beam headlights let you see clearly about 150 to 200 feet ahead.
Knowing how short low beams reach tells you why you have to slow down when you use them.
Your lower beam headlights will let you see clearly about 150 to 200 feet ahead.
The speed that lets you stop within your low beam reach is about 45 mph.
Going faster than this on low beams means you are driving into darkness you can't stop inside.
Driving at a speed that allows you to stop within this distance is about 45 mph.
High beam headlights let you see clearly about 350 to 400 feet ahead.
High beams light the road about twice as far, which buys you more time to spot and stop for trouble.
Your high beam headlights will let you see clearly about 350 to 400 feet ahead.
The speed that lets you stop within your high beam reach is about 65 mph.
Even with bright lights, there is a top speed past which you can't stop for what you see.
Driving at a speed that allows you to stop within this distance is about 65 mph.
At night, add at least 1 more second to your following distance.
In the dark you see the car ahead brake later, so you need extra time to react.
You need to increase your following distance by adding at least one additional second for night driving conditions and at least two additional seconds for driving on unfamiliar roadways at night.
On unfamiliar roads at night, add at least 2 more seconds to your following distance.
On a road you don't know, curves and turns come as a surprise in the dark, so you need even more room.
You need to increase your following distance by adding at least one additional second for night driving conditions and at least two additional seconds for driving on unfamiliar roadways at night.
A dirty windshield increases glare and hides the road, signs and other drivers; keep windows clean inside and out.
Dirt and film on the glass scatter oncoming headlights into a blinding haze.
A dirty windshield increases glare and obscures the road, signs and other motorists.
If an oncoming driver will not dim their lights, look to the right edge of the road as a guide and slow down.
Staring into bright lights blinds you for a moment. The right edge keeps you in your lane without the glare.
If a stubborn driver refuses to dim the lights, look to the right edge of the road as a guide and slow down.
On the test
At night, how far ahead should you be able to stop?
Within the distance your headlights show. If you drive faster than your lights reach, something in the road shows up too late to stop for. Class D & E Driver's Guide, p.75: “When driving at night, you must be able to stop within the distance you can see ahead with your headlights.”
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.")