Yellow lane lines — Massachusetts Permit Test
Yellow lane lines on the Massachusetts permit test — 6 rules, each with the reason behind it and a question on it while it is fresh.
The rules
Yellow lane lines separate lanes of traffic moving in opposite directions.
Yellow on your left means the traffic on the far side of it is coming toward you. That is the whole warning.
Yellow lane lines separate lanes of traffic moving in opposite directions.
Single yellow lines may also mark the left edge of the pavement on divided highways and one-way streets.
On a one-way street the yellow line is not about oncoming traffic at all. It marks the left edge.
Single yellow lines may also mark the left edge of the pavement on divided highways and one-way streets.
Stay to the right of a broken yellow line unless you are passing a vehicle in front of you.
The broken yellow is the one line you may cross into oncoming traffic on, and only for as long as the pass takes.
A broken yellow line separates lanes of traffic moving in opposite directions. Stay to the right of the line, unless you are passing a vehicle in front of you.
Where one solid and one broken yellow line separate opposite lanes, you cannot cross if the solid line is closer to you.
Which side you are on decides the rule. The same pair of lines means different things to the two directions.
If the solid yellow line is closer to you, you cannot cross the lines.
Where the broken yellow line is closer to you, you can only cross to pass another vehicle when it is safe.
The broken line on your side is permission to pass and nothing else. It is not a general invitation to cross.
If the broken line is closer to you, you can only cross the line to pass another vehicle when it is safe to do so.
Two solid yellow lines prohibit passing, and you may not cross them unless turning left when it is safe.
The left turn is the only exception. Everything else about two solid yellow lines is a prohibition.
Two solid yellow lines prohibit vehicles from crossing them to pass another vehicle. You may not cross these lines unless turning left when it is safe to do so.
On the test
What do yellow lane lines separate?
Lanes of traffic moving in opposite directions. Yellow on your left means the traffic on the far side of it is coming toward you. That is the whole warning. Massachusetts Driver's Manual, p.90: “Yellow lane lines separate lanes of traffic moving in opposite directions.”
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 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)