Who Is at Fault in a Massachusetts Intersection Accident?

Massachusetts answers that question with two statutes most drivers have never read, and they are far more specific than the general expectation that everyone drives carefully. M.G.L. c. 89, sec. 8 puts four separate duties in a single paragraph: when two vehicles reach an intersection at about the same instant the driver on the left yields to the driver on the right, a driver turning left across oncoming traffic yields until the turn can be made with reasonable safety, a driver entering a rotary yields to traffic already in it, and none of those rules applies where a police officer or a lawfully erected sign or signal directs otherwise. M.G.L. c. 89, sec. 9 adds the sign rules, and it contains something unusual: if a driver goes past a yield sign without stopping and then collides with a vehicle in the intersection, the statute says that collision “shall be deemed prima facie evidence of his failure to yield the right of way.” Fault is still apportioned after that, because Massachusetts compares negligence rather than assigning it whole. To talk through a specific intersection crash, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is offered without charge.

Why the Intersection Rules Are Their Own Subject

Most writing about car accident fault in Massachusetts stops at two general ideas: the insurer decides fault under its own regulatory presumptions, and a court decides legal fault under the comparative negligence statute. Both are true, both matter, and the two tracks can reach different answers about the same crash. That framework is set out in how fault is determined in a Massachusetts car accident and is not repeated here.

What that framework does not tell you is which duty was actually breached. At an intersection the answer is usually not that somebody was careless. It is that one of four or five specific statutory duties was not performed, and the whole investigation turns on which one. A driver who held the right of way under c. 89, sec. 8 and a driver who was obliged to yield under c. 89, sec. 9 are in very different positions before anyone starts talking about percentages.

This is not a rare situation. It is roughly a third of everything that happens on Massachusetts roads.

Answer Capsule

Fault at a Massachusetts intersection is decided by two statutes. M.G.L. c. 89, sec. 8 provides that when two vehicles approach or enter an intersection “at approximately the same instant, the operator of the vehicle on the left shall yield the right-of-way to the vehicle on the right”; that a driver “intending to turn left, in an intersection, across the path or lane of vehicles approaching from the opposite direction shall, before turning, yield the right-of-way until such time as the left turn can be made with reasonable safety”; and that “any operator of a vehicle entering a rotary intersection shall yield the right-of-way to any vehicle already in the intersection.” Those rules give way to a police officer or to a lawfully erected sign or signal. M.G.L. c. 89, sec. 9 governs signs. A driver at a stop sign or flashing red must stop at the line, or before the crosswalk, or at the point with a view of approaching traffic, and then yield to any vehicle “approaching on another roadway so closely as to constitute an immediate hazard.” A driver at a yield sign must slow and stop if safety requires it, and if that driver passes the yield sign without stopping and collides with a vehicle in the intersection, the statute makes the collision “prima facie evidence of his failure to yield the right of way.” Section 9 also forbids entering an intersection you cannot clear, and states that “a green light is no defense to blocking the intersection.” Violating sec. 9 carries “a fine not to exceed $150 for each offense.” None of this decides a civil case by itself, because M.G.L. c. 231, sec. 85 apportions fault between drivers and bars recovery only where the claimant’s share is greater than the defendant’s. This is general information about Massachusetts law, not legal advice. Call Jim Glaser Law at (617) JIM-WINS; the first telephone consultation is offered without charge.

Rule One: Arriving Together, the Vehicle on the Left Yields

The oldest of the four rules is also the one people misremember. It is not a rule about who got there first, and it does not apply at every intersection. It applies when two vehicles “approach or enter an intersection of any ways” at “approximately the same instant.” In that specific situation the driver on the left yields to the driver on the right.

Two things narrow it. The first is the timing condition. If one driver was plainly into the intersection before the other arrived, this is not the rule that governs, and the case turns on ordinary care and on whatever signs or signals were present. The second is the closing sentence of the paragraph, which suspends all of the section’s rules where “an operator is otherwise directed by a police officer, or by a traffic regulating sign, device or signal lawfully erected and maintained.” A signalised intersection, a stop sign, a yield sign or an officer waving traffic through displaces the right-hand rule entirely. In practice the right-hand rule decides crashes at uncontrolled intersections, which in Massachusetts tend to be residential side streets rather than main roads.

The rule cuts both ways in an investigation. A driver who was on the right, and who can show the two vehicles arrived together, is pointing at a statutory duty rather than at a judgment call. A driver who was on the left is not automatically liable, but is starting from behind.

Rule Two: the Left Turn Across Oncoming Traffic

This is the intersection crash that generates the most argument, and the statute is unusually blunt about it. The turning driver “shall, before turning, yield the right-of-way until such time as the left turn can be made with reasonable safety.”

Read the words “until such time as.” The duty is not satisfied by looking once. It continues for as long as the turn has not yet been completed safely. That is why a green light is not an answer to this rule. A circular green permits the turn; it does not grant priority over oncoming traffic, and nothing in sec. 8 makes a green light a defence to the yield duty. A green arrow is a different matter, because a protected turn phase is a traffic signal directing the operator, which is precisely the situation the final sentence of the paragraph carves out.

It does not follow that the turning driver carries the whole loss. An oncoming driver travelling at a speed that was not reasonable and proper, or who entered on a signal that had already changed, can carry a share, and in Massachusetts a share is a real thing rather than a rhetorical point. That is the subject of comparative negligence and partial fault in Massachusetts.

Rule Three: Rotaries, and a Reputation the Data Does Not Support

Massachusetts rotaries have a fearsome reputation, and the statute that governs them is one sentence long. “Any operator of a vehicle entering a rotary intersection shall yield the right-of-way to any vehicle already in the intersection.” The driver in the circle has the right of way. The driver entering it does not.

The reputation is worth testing against the record, because it shapes what people assume about a rotary crash. MassDOT crash records for 2022 through 2024 place 5,844 crashes at traffic circles statewide. Four of them were fatal. That is a rate of 0.68 fatal crashes per 1,000, against 2.68 per 1,000 for Massachusetts crashes as a whole, and it is the lowest rate of any junction type in the file. Traffic circles also record the lowest injury share, 17.28 per cent of their crashes against a statewide 22.89 per cent. Rotaries produce collisions. What they do not produce, relative to how many collisions they produce, is serious harm, which is what geometry that forces everybody to slow down and turn in the same direction would predict.

That matters for a claim in a practical way. A rotary case is frequently a low-speed, disputed, property-damage-plus-soft-tissue case where the physical evidence is thin and the statutory rule is doing most of the work. Establishing which vehicle was already in the circle is usually the whole argument.

Rule Four: Stop Signs, Yield Signs, and the Sentence That Can Settle a Case

Section 9 is the statute nobody quotes, and it contains the single most useful sentence in this area of Massachusetts law.

At a stop sign or a flashing red indication, the driver “shall stop at a clearly marked stop line, but if none, before entering the crosswalk on the near side of the intersection, or, if none, then at the point nearest the intersecting roadway where the driver has a view of approaching traffic on the intersecting roadway before entering it.” Stopping is not the end of the duty. After stopping, the driver must “yield the right of way to any vehicle in the intersection or approaching on another roadway so closely as to constitute an immediate hazard.” A driver who stops, looks, pulls out and is struck has satisfied the first half of the duty and not necessarily the second.

At a yield sign the requirement is different in form: slow “to a speed reasonable for the existing conditions and, if required for safety to stop, shall stop,” then yield on the same immediate-hazard test. And then the statute does something it does nowhere else in this chapter. It provides that “if such a driver is involved in a collision with a vehicle in the intersection or junction of roadways, after driving past a yield sign without stopping, such collision shall be deemed prima facie evidence of his failure to yield the right of way.”

Prima facie evidence is not a conclusion. It means the fact is taken as established unless it is met with evidence to the contrary, which in practice shifts the work onto the driver who went past the sign. Two conditions have to hold for it to apply: there was a yield sign, and that driver went past it without stopping. It does not apply at stop signs, and it does not apply where the yielding driver did stop.

Blocking the Intersection: a Green Light Is No Defense

The last rule in sec. 9 is one most drivers would be surprised to learn is a statute at all. “The driver of a motor vehicle shall not cross or enter an intersection, which it is unable to proceed through, without stopping and thereby blocking vehicles from travelling in a free direction. A green light is no defense to blocking the intersection. The driver must wait another cycle of the signal light, if necessary.”

That is three sentences of law aimed at a single behaviour, and the middle one is quotable because it forecloses the argument everybody makes. In congested Massachusetts cities the vehicle stranded across the box is a frequent contributor to an angle collision, and the driver who is blocking is rarely thought of as the one who did something wrong. The statute treats them as having done something wrong, and it also treats the situation as foreseeable, since it tells the driver what to do instead: wait.

Section 9 violations carry “a fine not to exceed $150 for each offense,” and for this section the word vehicle “shall include a trackless trolley,” a detail that reflects how old and how specific this part of the General Laws is.

What the Crash Record Shows About Intersections

Fault rules are easier to weigh with the frequencies beside them. A pull from the MassDOT IMPACT open crash data for 2022 through 2024, run on 2026-09-19 and committed to this site’s repository, records 405,239 Massachusetts crashes across those three years. Grouped by where they happened:

Location type	Crashes, 2022 to 2024	Share of all crashes	Fatal crashes	Fatal per 1,000
Not at a junction	231,199	57.05%	758	3.28
Four-way intersection	67,875	16.75%	115	1.69
T-intersection	62,241	15.36%	148	2.38
Y-intersection	8,043	1.98%	14	1.74
Five-point or more	1,502	0.37%	0	0.00
Driveway	8,658	2.14%	12	1.39
Off-ramp and on-ramp	14,549	3.59%	17	1.17
Traffic circle	5,844	1.44%	4	0.68
Railway grade crossing	390	0.10%	1	2.56

Add the four intersection types together and 139,661 crashes, 34.46 per cent of everything, happened at an intersection. The figure is stable rather than drifting: 34.27 per cent in 2022, 34.54 in 2023, 34.58 in 2024.

The severity finding runs against the intuition, and it belongs here because leaving it out would mislead. Intersections are not where Massachusetts drivers are most likely to be killed. Their fatal rate is 1.98 per 1,000 crashes against 3.28 for crashes away from a junction. What intersections do is injure. The injury share of intersection crashes is 26.85 per cent against 20.99 per cent away from a junction, and the statewide figure is 22.89 per cent. More harm, less often lethal, which is what crossing-path collisions at urban speeds would predict.

The manner of collision makes the same point from the other direction. Of the 139,661 intersection crashes, 60,459, or 43.29 per cent, are recorded as angle collisions. Away from a junction, angle collisions are 12.85 per cent, and the leading category is the single vehicle crash at 30.02 per cent. The angle crash is the intersection crash, and the angle crash is exactly the fact pattern c. 89, sec. 8 and sec. 9 were written for. Which community carries this burden most heavily is a separate question, and the town-level numbers are in Massachusetts intersection crash data by community.

A Traffic Citation Is Not the Same as Civil Fault

A citation for failing to yield is evidence, and it is useful evidence, but it is not the civil case. Three separate decisions can follow one intersection crash, and they are made by three different institutions on three different records: a motor vehicle infraction decided in the district court, an at-fault determination made by an insurer under its own regulatory presumptions and appealable to the Board of Appeal, and a civil liability question decided by agreement or by a court under M.G.L. c. 231, sec. 85. It is entirely possible to be surcharged and still recover, or to receive no citation and still be found substantially at fault.

The statutory exception in sec. 8 is worth reading with that in mind. The right-of-way rules “shall not apply when an operator is otherwise directed by a police officer, or by a traffic regulating sign, device or signal lawfully erected and maintained in accordance with the provisions of section two of chapter eighty-five.” The words “lawfully erected and maintained” are doing work. A sign that is down, obscured by growth, or facing the wrong way is a fact worth establishing early, because it goes to whether the rule that appears to decide the case applied at all. Those conditions change. Photographs taken in the following days are worth more than a description given months later.

One more point specific to Massachusetts. These rules apply to intersections of ways as defined in M.G.L. c. 90, sec. 1. A private parking lot is usually not such a way, which is why a collision in one is governed by ordinary negligence instead of by these statutes. That difference is set out in who is at fault in a Massachusetts parking lot accident.

Why Comparative Negligence Decides Most of These Cases

Intersection cases are the archetypal shared-fault cases, and Massachusetts is a modified comparative negligence state. A claimant whose own share of negligence is not greater than the combined share of the defendants may recover, reduced by that percentage, and is barred above it. The practical effect at an intersection is that the argument is rarely about whether one driver breached a duty. It is about how much of the loss the other driver’s speed, attention or signal compliance accounts for.

That is why the statutory rules matter so much at the start of a case. A driver who can anchor the other side’s conduct to a specific duty in c. 89 is arguing from a fixed point. A driver relying only on a general claim of carelessness is arguing about impressions. The full treatment of how percentages are set, and what the bar at greater-than-half does, is in comparative negligence and partial fault in Massachusetts.

Two categories of road user sit apart from this and deserve their own note. Bicycle crashes are recorded at intersections far more often than crashes generally: 2,570 of 4,356 bicycle crashes in the three-year file, 59.00 per cent, against the 34.46 per cent baseline. Pedestrian crashes are at 45.72 per cent. The cyclist’s position under Massachusetts law is covered in Massachusetts bicycle laws, and the pedestrian numbers by place are in Massachusetts pedestrian crash data.

Frequently Asked Questions

Q: Who has the right of way at a Massachusetts intersection with no signs or signals?

A: M.G.L. c. 89, sec. 8 provides that when two vehicles approach or enter an intersection “at approximately the same instant, the operator of the vehicle on the left shall yield the right-of-way to the vehicle on the right.” The rule is conditional on the two vehicles arriving at about the same time, and it does not apply where a police officer, sign, device or signal lawfully erected and maintained directs otherwise.

Q: I had a green light and was turning left. Is the oncoming driver at fault?

A: Not on the green light alone. M.G.L. c. 89, sec. 8 requires a driver turning left across oncoming traffic to “yield the right-of-way until such time as the left turn can be made with reasonable safety,” and a circular green permits the turn without granting priority over oncoming vehicles. A green arrow is different, because a protected turn phase is a signal directing the operator. Fault can still be shared where the oncoming driver’s speed or signal compliance contributed.

Q: What happens if I drove past a yield sign and there was a collision?

A: M.G.L. c. 89, sec. 9 provides that where a driver “is involved in a collision with a vehicle in the intersection or junction of roadways, after driving past a yield sign without stopping, such collision shall be deemed prima facie evidence of his failure to yield the right of way.” That establishes the failure to yield unless it is met with contrary evidence. It applies only at yield signs, and only where the driver did not stop.

Q: I stopped at the stop sign and was still hit. Am I in the clear?

A: Stopping is only the first half of the duty. M.G.L. c. 89, sec. 9 requires the driver, after stopping, to “yield the right of way to any vehicle in the intersection or approaching on another roadway so closely as to constitute an immediate hazard.” Whether an approaching vehicle was an immediate hazard is a question of fact, and its speed is part of that question.

Q: Who is at fault in a Massachusetts rotary crash?

A: The starting point is one sentence of M.G.L. c. 89, sec. 8: “any operator of a vehicle entering a rotary intersection shall yield the right-of-way to any vehicle already in the intersection.” Establishing which vehicle was already in the circle is usually the central factual question. Fault is then apportioned under M.G.L. c. 231, sec. 85 like any other case.

Q: Are rotaries the most dangerous intersections in Massachusetts?

A: Not by the severity measures in the crash record. MassDOT data for 2022 through 2024 records 5,844 traffic circle crashes and 4 fatal, a rate of 0.68 per 1,000 against a statewide 2.68, the lowest of any junction type in the file, and the lowest injury share at 17.28 per cent against 22.89 per cent statewide. They produce collisions without producing proportionate harm.

Q: Can I be at fault for blocking an intersection even on a green light?

A: M.G.L. c. 89, sec. 9 says a driver “shall not cross or enter an intersection, which it is unable to proceed through, without stopping and thereby blocking vehicles from travelling in a free direction,” and then states directly that “a green light is no defense to blocking the intersection. The driver must wait another cycle of the signal light, if necessary.” Violations of the section carry a fine not to exceed $150 for each offense.

Q: What share of Massachusetts crashes happen at intersections?

A: About one in three. In MassDOT crash records for 2022 through 2024, 139,661 of 405,239 crashes, 34.46 per cent, were coded to a four-way, T, Y or five-point intersection, and 231,199, or 57.05 per cent, were not at a junction at all. The share was steady across the three years at 34.27, 34.54 and 34.58 per cent.

Q: Is Jimmy Knows AI giving me legal advice?

A: No. This is general information about Massachusetts law and public crash data, not legal advice, and reading it does not create an attorney client relationship. Statutes set duties; whether a duty was breached in a particular collision, and how fault is apportioned, depends on facts this page cannot know. To discuss a specific crash, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is offered without charge.

Talking to a Lawyer

The useful thing about the intersection statutes is that they tell you what evidence is worth gathering, and they tell you quickly.

If the right-hand rule or the left-turn rule is in play, the question is timing, and timing is proved with things that decay: signal phase records, nearby camera footage, the position of the vehicles before they were moved, and the recollection of anyone who was waiting at the same light. If a sign rule is in play, the question is often the sign itself, whether it was there, whether it was visible, and whether it was lawfully erected and maintained, which is a matter of municipal or state records and of photographs taken before the next round of maintenance. If the collision involved a driver stranded across the box, the relevant fact is the signal cycle and the queue, which nobody documents unless somebody thinks to.

The first report also matters. What the RMV crash report says, and what the police report says, will be read months later by people who were not there. Reporting a car accident in Massachusetts sets out the five-day written report duty and what it requires. Whether the injuries clear the threshold for a pain and suffering claim is a separate question, answered in the serious injury threshold. Where these crashes happen most often across the state is in the Massachusetts crash report.

Fee arrangements in injury work are usually contingent, meaning no fee unless there is a recovery, and the client may be responsible for costs and expenses.

Jim Glaser Law can be reached at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is offered without charge.