Signs by description — Pennsylvania Permit Test
Signs by description on the Pennsylvania permit test — 9 rules, each with the reason behind it and a question on it while it is fresh.
The rules
The stop sign is the only eight-sided sign on the highway.
One shape is kept for one message, so it can be read from behind, in the dark, or under snow.
The STOP sign is the only octagon-shaped (8-sided) sign you see on the highway.
Yield signs are three-sided.
The shape is unlike anything else on the road, which is what lets you read it before the word.
YIELD signs are triangular (3-sided) in shape.
The no passing zone sign is the only pennant-shaped warning sign, and it is placed on the left side of the road facing the driver.
It faces the driver who is about to pull out, which is the one person who has to see it.
This is the only pennant-shaped warning sign. This sign marks the beginning of a no passing zone and is placed on the left side of the road facing the driver.
The school sign is the only five-sided sign used on the roadway, and with a downward arrow beneath it, it marks the school crossing itself.
Children step into the road without checking, and a parked car hides someone that short completely.
This is the only pentagon-shaped sign used on the roadway. It means you are approaching a school zone.
Warning signs are usually diamond shaped with black symbols or words on a yellow background.
You read the color long before the words, which buys you the seconds to slow down.
Warning signs are usually diamond shaped with black symbols or words on a yellow background.
Work zone signs are the same shape as warning signs but orange with black lettering rather than yellow.
The color is the only difference, and it is the one that tells you people are on the road.
Work Zone Signs are normally diamond shaped, like warning signs, but they are orange with black lettering instead of yellow with black lettering.
Highway and expressway guide signs are green with white letters.
Sorting signs by color lets you skip the ones that are not about safety.
The following three signs are examples of highway and expressway guide signs. They are green with white letters.
Service signs are blue with white letters or symbols, and tourist-oriented directional signs may be blue or brown.
Two of these look alike at speed, so the one you need in an emergency is worth knowing cold.
The signs are square or rectangular, are blue with white letters or symbols, and show the location of various services located at the next exit.
Regulatory signs are usually black and white vertical rectangles or squares, though some are black, white and red, and others red and white.
These are the signs that carry the law, so ignoring one is an offense and not just a risk.
Usually, regulatory signs are black and white vertical rectangles or squares, like SPEED LIMIT signs.
On the test
Which sign is the only eight-sided one on the highway?
The stop sign. One shape is kept for one message, so it can be read from behind, in the dark, or under snow. PA Driver's Manual, p.10: “The STOP sign is the only octagon-shaped (8-sided) sign you see on the highway.”
How this works
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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 PA Driver's Manual, published by the Pennsylvania Department of Transportation, and against the state code itself. Last checked 2026-09-06.