What Is the Most Common Type of Car Crash in Massachusetts?

The rear-end collision. Of the 405,239 crashes MassDOT recorded in Massachusetts from 2022 through 2024, 99,423 were coded rear-end, which is 24.53 per cent, or close to one crash in four. Angle collisions are second at 96,896, and single vehicle crashes third at 92,620. Those three account for 71.30 per cent of everything that happened on Massachusetts roads across the three years. The more useful finding is what happens when you set the frequency ranking beside the severity ranking, because they are almost inverted. The most common crash type in Massachusetts is also among its least deadly: rear-end collisions were fatal in 0.79 of every 1,000, against a statewide average of 2.68. The deadliest type by a wide margin is the head-on, which is only 2.37 per cent of crashes and 14.44 per cent of the deaths. Every figure here comes from MassDOT crash records and can be checked community by community in the Massachusetts crash report. To talk through 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.

The Full Ranking, by How Often Each One Happens

Every manner of collision MassDOT recorded at least 3,000 times from 2022 through 2024, in order of frequency, with what happened to the people involved.

Collision type	Crashes	Share of all crashes	Fatal crashes	Fatal per 1,000	Injury share
Rear-end	99,423	24.53%	79	0.79	23.32%
Angle	96,896	23.91%	165	1.70	26.63%
Single vehicle crash	92,620	22.86%	585	6.32	26.48%
Sideswipe, same direction	55,710	13.75%	36	0.65	10.29%
Front to Rear	14,259	3.52%	11	0.77	18.25%
Sideswipe, opposite direction	12,952	3.20%	9	0.69	16.92%
Head-on	9,603	2.37%	157	16.35	47.62%
Front to Front	6,362	1.57%	12	1.89	31.72%
Rear to Side	4,260	1.05%	0	0.00	6.41%
Rear-to-rear	3,009	0.74%	0	0.00	7.38%

Two notes on reading that table honestly. MassDOT carries both a Rear-end value and a separate Front to Rear value, and they are left separate here because that is how the source records them. If you want the combined figure for a vehicle being struck from behind, it is 113,682 crashes, or 28.05 per cent, and it is a combination rather than a category in the file. The two zero counts in the fatal column are three-year counts of zero, which is not the same claim as saying that kind of collision cannot kill anyone. How far the mix moves from one community to the next, with the paired codes combined so that towns can be compared fairly, is set out in what kind of crash is most common in your Massachusetts town.

Across all 405,239 crashes the statewide figures are 1,087 fatal, a rate of 2.68 per 1,000, and 92,760 that recorded an injury, which is 22.89 per cent.

Answer Capsule

The most common type of car crash in Massachusetts is the rear-end collision, 99,423 of 405,239 crashes from 2022 through 2024, or 24.53 per cent. Angle collisions follow at 96,896, or 23.91 per cent, and single vehicle crashes at 92,620, or 22.86 per cent. Frequency and severity run in almost opposite directions. Rear-end collisions were fatal in 0.79 of every 1,000 against a statewide 2.68, while head-on collisions are only 2.37 per cent of crashes and were fatal in 16.35 of every 1,000, which is 20.6 times the rear-end rate and 6.1 times the statewide rate. Head-on collisions also recorded an injury 47.62 per cent of the time, close to half. Single vehicle crashes account for 585 of the 1,087 fatal crashes, or 53.82 per cent, but that category is not only run-off-road collisions: 170 of those 585 fatal single vehicle crashes involved a pedestrian being struck. Single vehicle and head-on collisions together are 25.23 per cent of crashes and 68.26 per cent of the deaths. In Massachusetts, whether a crash produces a pain and suffering claim turns on M.G.L. c. 231, sec. 6D rather than on the collision type, and fault is apportioned under M.G.L. c. 231, sec. 85. This is general information about public crash data and Massachusetts law, not legal advice. Call Jim Glaser Law at (617) JIM-WINS; the first telephone consultation is offered without charge.

The Inversion, Which Is the Real Finding

Put the two rankings side by side and they barely resemble each other.

By frequency the order is rear-end, angle, single vehicle, sideswipe. By share of deaths the order is single vehicle at 53.82 per cent, angle at 15.18 per cent, head-on at 14.44 per cent, and rear-end all the way down at 7.27 per cent despite being the most common crash on the list.

The reason is geometry rather than anything legal. A rear-end collision happens between two vehicles travelling in the same direction, so the closing speed is the difference between them. A head-on happens between vehicles travelling in opposite directions, so the closing speed is the sum. The same 35 miles per hour of traffic produces a very different impact depending on which of those two configurations delivers it, and the injury column shows it: 23.32 per cent of rear-end collisions recorded an injury against 47.62 per cent of head-on collisions.

This matters for anyone trying to reason about their own crash from a headline. A crash type being common tells you almost nothing about how badly it tends to end.

Head-On Collisions: Rare, and Then Not Rare at All

The head-on is the clearest number in this dataset. 9,603 crashes across three years, 2.37 per cent of the total, and 157 fatal crashes, which is 14.44 per cent of every fatal crash in the state.

At 16.35 fatal per 1,000 it runs 20.6 times the rear-end rate and 6.1 times the statewide average of 2.68. Nearly half of them, 47.62 per cent, recorded an injury, which is more than double the statewide injury share of 22.89 per cent.

Massachusetts also records a separate and smaller Front to Front value, 6,362 crashes at 1.89 fatal per 1,000. It is reported separately here because the source keeps it separate, and folding it into the head-on figure would inflate the headline category with collisions that behave very differently.

Single Vehicle Crashes Are Not All Run-Off-Road

The single largest block of fatal crashes in Massachusetts is the single vehicle crash: 585 of 1,087, or 53.82 per cent. That number invites an obvious and partly wrong reading, so here is the split that corrects it.

Of those 585 fatal single vehicle crashes, 170 involved a pedestrian. A car striking a person on foot is recorded as a single vehicle crash in this data, because only one motor vehicle was involved, and 4,087 of the state’s 5,980 pedestrian crashes, 68.34 per cent, sit in this category for that reason. So the largest category of fatal crash in Massachusetts is not simply drivers leaving the road. Close to three in ten of its fatal cases are a vehicle striking a person who was not in a vehicle at all.

Setting the 170 aside still leaves 415 fatal single vehicle crashes that did not involve a pedestrian, which is 38.18 per cent of all fatal crashes and remains the largest block on the list. Both things are true, and reporting only the 585 would have obscured the more important half of it. The pedestrian side of this picture is covered separately in Massachusetts pedestrian crash data.

Rear-End: The Most Common, and the Least Lethal

99,423 crashes, 0.79 fatal per 1,000, 23.32 per cent recording an injury. It is the crash most Massachusetts drivers will actually have, and it is the one most likely to end with two drivable cars and a stiff neck the next morning.

That combination is worth understanding, because a low fatality rate is not the same as a low injury rate. Almost a quarter of rear-end collisions put someone in a position to need treatment. Soft tissue neck and back injuries are exactly the pattern this configuration produces, and they are also the pattern insurers most often dispute.

Who is at fault in one of these is a separate question from how often they happen, and Massachusetts answers it on two tracks that do not always agree. That is set out in how fault is determined in a Massachusetts car accident.

Angle Collisions and Where They Come From

Angle collisions, 96,896 of them, are second by frequency and second by share of fatal crashes at 15.18 per cent. They are also the collision type most tied to a place rather than to a behaviour.

The junction data explains why. Angle collisions are overwhelmingly a junction event, which is the mechanism behind the intersection figures published in which Massachusetts communities have the most intersection crashes. Where roads cross, vehicles travel on crossing paths, and a crossing path is what produces an angle impact.

The effect is sharpest for cyclists. 1,815 of the state’s 4,356 bicycle crashes, 41.67 per cent, are angle collisions, against 23.91 per cent for traffic generally. A cyclist is far more likely than a driver to be struck by something arriving from the side. The community-level version of that is in which Massachusetts city has the most bicycle crashes.

Driveways produce the same crossing-path effect on a smaller scale, and they concentrate in a very different set of communities. That is the subject of Massachusetts driveway crash data.

What These Numbers Cannot Tell You

This belongs in the article rather than in a footnote.

Crash records count collisions. They carry no measure of exposure, meaning how many vehicles travelled in each configuration, so nothing here can say which collision type is most dangerous per mile driven or per trip taken. Head-on collisions being 2.37 per cent of crashes does not mean a Massachusetts driver has a 2.37 per cent chance of one.

The figures also describe patterns across hundreds of thousands of collisions and say nothing about fault in any particular one. A rear-end collision with a low fatality rate across 99,423 events can still be the one that ends someone’s ability to work.

Finally, the manner field is coded by the officer completing the report. Unknown appears 6,456 times and Not reported 3,687 times, and those are left in the denominator here rather than quietly dropped, which is why the listed shares do not sum to 100 per cent.

What the Collision Type Does and Does Not Decide in a Massachusetts Claim

Massachusetts does not sort injury claims by collision type. It sorts them by cost and by consequence, and the gate is statutory.

Under M.G.L. c. 231, sec. 6D, a person injured in a motor vehicle crash may recover damages for pain and suffering only if reasonable and necessary medical expenses are determined to be in excess of two thousand dollars, unless the injury causes death, or consists in whole or in part of loss of a body member, or consists in whole or in part of permanent and serious disfigurement, or produces the loss of sight or hearing described in the listed paragraphs of M.G.L. c. 152, sec. 36, or consists of a fracture. A fracture clears the gate whatever the bill says. That analysis is set out in full in the serious injury threshold.

Before any of that, medical bills and lost wages are handled first by personal injury protection under M.G.L. c. 90, sec. 34M, which applies whoever caused the crash. The first paragraph of that section was amended by chapter 78 of the acts of 2025, effective 24 February 2026. The detail is in PIP in Massachusetts.

Where more than one person contributed to the crash, M.G.L. c. 231, sec. 85 provides that contributory negligence shall not bar recovery so long as the injured person’s negligence was not greater than the total amount of negligence attributable to the person or persons against whom recovery is sought, with damages diminished in proportion. The same section abolishes the defence of assumption of risk. See comparative negligence in Massachusetts.

So the collision type is evidence, not a category of claim. It shapes what an investigation looks for, and nothing more.

Frequently Asked Questions

Q: What is the most common car accident in Massachusetts?

A: The rear-end collision, 99,423 of 405,239 crashes recorded from 2022 through 2024, which is 24.53 per cent. Angle collisions are second at 96,896 and single vehicle crashes third at 92,620.

Q: What is the deadliest type of crash in Massachusetts?

A: The head-on, measured by how often it kills. 157 of 9,603 head-on collisions were fatal, a rate of 16.35 per 1,000 against a statewide 2.68. Measured by total fatal crashes instead, the single vehicle crash is largest at 585 of 1,087.

Q: Why do single vehicle crashes account for more than half of Massachusetts fatal crashes?

A: Partly because the category is broader than it sounds. 170 of those 585 fatal single vehicle crashes involved a pedestrian being struck, because a collision with a person on foot involves only one motor vehicle and is coded that way. Excluding those still leaves 415, or 38.18 per cent of all fatal crashes, so the category remains the largest either way.

Q: Are rear-end collisions serious?

A: They are the least likely of the common types to be fatal, at 0.79 per 1,000, but 23.32 per cent of them still recorded an injury. Low fatality and low injury are not the same thing, and neck and back injuries are the characteristic pattern.

Q: Do these numbers decide who was at fault in my crash?

A: No. They describe patterns across hundreds of thousands of collisions and carry no information about any particular one. Massachusetts apportions fault under M.G.L. c. 231, sec. 85, on the facts of the individual crash.

Q: Are cyclists struck differently from drivers?

A: As a share, yes. 41.67 per cent of bicycle crashes are angle collisions against 23.91 per cent of crashes generally, so a cyclist is disproportionately likely to be struck by something arriving from the side rather than from behind.

Q: Why do the percentages in the table not add up to 100?

A: Because Unknown at 6,456 crashes and Not reported at 3,687 are left in the denominator rather than dropped, along with several categories below the 3,000 threshold used for the table. Removing them would make every other share look slightly larger than it is.

Q: Where do these numbers come from?

A: MassDOT IMPACT open crash records for calendar years 2022, 2023 and 2024, pulled on 2026-09-20 and committed to this site’s repository at measurement/manner-crash-pull-2026-09-20.json. The denominators match an independent pull of a different field made on 2026-09-19 exactly, at 405,239 crashes, 1,087 fatal, 92,760 injury, 4,356 bicycle and 5,980 pedestrian.

Q: Is Jimmy Knows AI giving me legal advice?

A: No. This is general legal and public-safety information about Massachusetts crash data, not legal advice, and reading it does not create an attorney client relationship. Crash statistics describe patterns across many collisions and say nothing about who was at fault in any particular one. 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 collision type is the first thing anyone can tell you about a crash and one of the least useful things for deciding what to do next. What matters is closer to the ground.

In a rear-end case the argument is usually not about who struck whom. It is about whether the injury is real and whether the treatment was reasonable, because the same configuration that makes these crashes survivable also makes them easy for an insurer to characterise as minor. Contemporaneous medical records do more work here than anything else.

In a head-on or a single vehicle case the questions move to the road itself: lane position, what the surface was doing, whether anything obstructed the view, and who is responsible for the way. Those facts sit in scene evidence that degrades within days, and in vehicle data that can be overwritten.

Where a pedestrian was struck, the case is rarely about the collision type at all. It is about sight lines, speed, lighting and right of way, and the statutory gate in M.G.L. c. 231, sec. 6D is usually cleared without argument.

In every one of those, the sooner the scene is fixed in writing and in photographs, the less the case depends on what anyone remembers months later.

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.