Trucks and buses — Pennsylvania Permit Test
Trucks and buses on the Pennsylvania permit test — 11 rules, each with the reason behind it and a question on it while it is fresh.
The rules
The blind spots around a truck or bus are called the No-Zone, and they are the areas where crashes are most likely.
If you cannot see the driver's mirrors, the driver cannot see you at all.
If you cannot see the side mirrors of the large vehicle ahead of you, its driver cannot see you.
The mirror works both ways, so the test is the same in both directions.
A loaded truck with good tires and properly adjusted brakes traveling at 65 miles an hour on a clear dry road needs a minimum of 600 feet to stop, against 400 feet for a car.
Cutting in and slowing down asks for a stop in a distance the truck does not have.
At highway speed it can take up to 30 seconds to pass a truck safely, so pass quickly and do not drive alongside it.
Half a minute alongside is half a minute in a place the driver cannot see.
Trucks make wide turns, and may look as though they are going straight or turning left when they are actually making a right turn; never try to squeeze between a turning truck and the curb.
The driver cannot see a car in that gap at all.
When a truck is passing you, keep to the far side of your lane, slow slightly and then hold a steady speed; never speed up while it passes.
Speeding up traps the truck out in the oncoming lane for longer.
Never try to cross behind a truck that is preparing to back up, even though it may be blocking the road for a few seconds.
Behind a reversing truck is the part of the No-Zone the driver can see least.
Escape or runaway ramps on long downgrades are only for large vehicles that are out of control or cannot stop; never stop or park near one.
A truck arriving at one has no way to steer around a parked car.
You should not try to pass a snow plow on either side, because plows may carry wing blades that stick out several feet and are hard to see.
The blade is wider than the truck and invisible in the spray.
In rural areas an orange triangle on the back of a farm tractor or horse-drawn vehicle marks a vehicle designed to operate at 25 miles an hour or less.
The marking is the only warning that the shape ahead is barely moving.
When passing a horse-drawn vehicle or a horseback rider, do not drive too fast or sound your horn, because it may frighten the horse.
A startled horse goes into the road, which is the opposite of what you want.
On the test
What are the blind spots around a truck called?
The No-Zone. If you cannot see the driver's mirrors, the driver cannot see you at all.
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.
All Pennsylvania permit topics
Where these come from
Every rule here is checked against PA Driver's Manual, published by the Pennsylvania Department of Transportation, and against the state code itself. Last checked 2026-09-06.