Regulatory signs — Massachusetts Permit Test
Regulatory signs on the Massachusetts permit test — 5 rules, each with the reason behind it and a question on it while it is fresh.
The rules
A sign that crosses a picture out with a slash means the thing in the picture is prohibited.
The picture inside is the thing you may not do. Once you know the pattern you can read a sign you have never seen before.
Signs that use a red circle with a diagonal slash mean that something is prohibited.
This sign means no left turn.
A left turn crosses the oncoming lane. Where this sign stands, that movement has been taken away entirely.
No left turn
This sign means no right turn.
It stands at intersections where a right turn would cross something a driver cannot see from the stop line.
No right turn
This sign means no U-turn.
A U-turn puts you across the whole road facing the wrong way. Where this sign stands there is not the room or the sight distance for it.
No U-turn
Regulatory signs inform drivers of traffic laws or regulations, and some of them use only words.
They carry the law itself rather than a warning about the road. A speed limit sign is one of them.
Some, such as SPEED LIMIT signs, may only include words.
On the test
What kind of message does this sign carry?
That something is prohibited. The picture inside is the thing you may not do. Once you know the pattern you can read a sign you have never seen before. Massachusetts Driver's Manual, p.86: “Signs that use a red circle with a diagonal slash mean that something is prohibited.”
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
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Where these come from
Every rule here is checked against Massachusetts Driver's Manual, published by the Massachusetts Registry of Motor Vehicles, and against the state code itself. Last checked 2026-09-16.
- src/assets/drivers-manuals/MA.pdf (Massachusetts Driver's Manual, Revised April 2026, Massachusetts Registry of Motor Vehicles, retrieved 2026-09-14 from mass.gov)
- src/assets/drivers-manuals/MA.pages.txt (pdftotext -layout over that PDF; sha256 pinned in SOURCES.json)
- src/assets/drivers-manuals/SOURCES.json (sha256, folio offset 8, folioMarker, nonLawPages, signGalleryPages and the extraction flag, each with its measured basis)