Reduced visibility — New Jersey Permit Test
Reduced visibility on the New Jersey permit test — 4 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A driver scrapes and wipes the windows clear of frost or ice before starting out.
A porthole scraped in the frost shows a slice of the road and hides the rest of it.
Frost or ice: Always scrape and wipe a vehicle’s windows before starting.
In fog a driver slows down, keeps the headlights on low beam and uses fog lights if the vehicle has them.
High beams bounce off the fog and come back at you. Low beams go under it.
Fog: Always slow down when driving in fog. Headlights should be kept on low beam and fog lights should be turned on if the vehicle has them.
Against sun glare a driver adjusts the visor to shield the eyes without cutting off the view of the road.
Pulled too far down, the visor hides the very thing the glare was already hiding.
Sun glare: Sun visors should always be adjusted to shield a motorist’s eyes without cutting off their view of the road.
When visibility is greatly reduced a driver stops off the road, out of the way of traffic, and turns on the flashers.
If you cannot see, nobody can see you either. The flashers are what mark where you stopped.
if visibility is greatly reduced, a motorist should stop alongside the road or on the shoulder, out of the way of traffic, and turn on emergency flashers
On the test
What must a driver do about frost on the windows before setting off?
Scrape and wipe the windows clear. A porthole scraped in the frost shows a slice of the road and hides the rest of it. New Jersey Driver Manual, p.99: “Frost or ice: Always scrape and wipe a vehicle’s windows before starting.”
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.
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Where these come from
Every rule here is checked against New Jersey Driver Manual, published by the New Jersey Motor Vehicle Commission, and against the state code itself. Last checked 2026-09-15.