How Dangerous Is Route 20 in Massachusetts?

Route 20 is the longest road in Massachusetts, and it is the first corridor in this series where the state’s own crash records show a fatality rate above the statewide average rather than below it. Across 2022 to 2024, the nine communities where MassDOT records a Route 20 segment among their highest-crash roads logged 43 fatal crashes on 14,031 total crashes, a rate of 3.06 per 1,000 against 2.68 for Massachusetts as a whole. The gap is real but modest, and it narrows to 3.06 against 2.74 when those towns are compared only with towns of similar crash volume. What is much larger, and much more consistent, is the exposure mix: those same communities record roughly half the bicycle and pedestrian crash rate of comparable towns. Fewer people on foot, more people dying. That is the signature of a high-speed undivided road running through low-density towns, and it points at two specific Massachusetts statutes. To talk through a specific crash, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day, and the first telephone consultation is offered without charge.

Where the Numbers Come From

Everything in this article comes from MassDOT IMPACT Open Crash Data, the Commonwealth’s public record of crashes reported to the Registry of Motor Vehicles. Town totals cover 2022, 2023 and 2024 together. The road-level counts are for 2024 alone, because that is the year the top-road lists cover. No figure in this article divides one of those by the other.

For scale, those same three years produced 405,245 crashes statewide, 1,087 of them fatal, 92,759 involving an injury, 4,356 involving a bicycle and 5,980 involving a pedestrian.

One caution belongs at the top rather than in a footnote. Crash records carry no traffic volume. A road with more crashes may simply carry more vehicles, and nothing in this data can separate a road that is more dangerous from a road that is busier. That is why the comparisons below hold crash volume constant wherever possible and report rates rather than raw counts.

The Nine Communities

MassDOT publishes each town’s eight highest-crash roads. Nine Massachusetts communities have at least one road on that list recorded with a Route 20 designation. Together those entries account for 234 crashes in 2024.

Community	Route 20 entries	Route 20 crashes, 2024	Share of the town’s top-eight roads
Shrewsbury	1	55	20.5%
Charlton	5	76	60.3%
Pittsfield	1	19	8.6%
Wilbraham	2	20	14.2%
Millbury	5	17	60.7%
Auburn	1	16	6.0%
Northborough	2	13	15.9%
Oxford	2	11	6.4%
Sturbridge	1	7	7.9%

That 234 is a floor and not a count, and the reason is worth understanding, because it applies to every road-level claim anyone makes from this dataset. MassDOT records the same physical road with and without its route number. Wilbraham’s list carries “BOSTON RD Rte” at 49 crashes and, separately, “BOSTON RD Rte 20 E” at 13 and “BOSTON RD Rte 20 W” at 7. Oxford’s list carries “SOUTHBRIDGE RD Rte” at 50 and, separately, “SOUTHBRIDGE ROAD Rte US20 E” at 6. Those unnumbered entries are very probably the same roads. They are not counted here, because an unlabelled entry cannot be proved from the file, and a data article that quietly resolves its ambiguities in whichever direction makes the headline bigger is not worth reading. The true Route 20 total is higher than 234. How much higher is not knowable from this source.

Two other limits apply. Each list stops at eight roads, so a town where Route 20 ranks ninth does not appear here at all. And Route 20 appears nowhere on the 24-row statewide list of 2024’s highest-crash roads, which is led by MAIN ST at 2,672 and by Interstate 93 northbound at 444. That absence is itself informative: Route 20 is a distributed corridor rather than a single hot spot, which is exactly what you would expect from a road that crosses the entire state.

The Fatality Finding, and the Objection to It

Here is the number that makes Route 20 different from every other corridor covered in this series.

Across 2022 to 2024, the nine communities recorded 43 fatal crashes on 14,031 total crashes. That is 3.06 fatal crashes per 1,000, against 2.68 per 1,000 for Massachusetts as a whole. Interstate 290’s corridor communities ran 1.69. Route 128’s ran below the state. Route 20’s run above it.

Now the objection, which is a good one. Route 20 towns are mostly small and mostly rural, and rural communities across Massachusetts already record higher fatality rates than urban ones, for reasons that have nothing to do with any particular road: higher speeds, longer distances to a trauma centre, fewer signalised intersections. If that is all this is, then the finding is about rurality and Route 20 is incidental.

So test it. Take every Massachusetts community in the same crash-volume band as these nine, between 800 and 2,900 crashes across the three years, and exclude the nine themselves. That leaves 103 comparable towns. They run 2.74 fatal crashes per 1,000.

The Route 20 communities still come in higher, at 3.06. But the margin drops from about 14 per cent above the state to about 12 per cent above matched towns, and it rests on 43 fatal crashes, which is a small enough number that four or five events in either direction would move it noticeably. The honest conclusion is that most of the gap survives the objection and none of it is dramatic.

Three individual towns carry most of it, and their rates are not modest at all. Charlton recorded 11 fatal crashes on 1,751 total, which is 6.3 per 1,000. Wilbraham recorded 5 on 830, or 6.0. Oxford recorded 5 on 1,063, or 4.7. All three sit at roughly twice the state rate. All three are Route 20 towns in the middle of the corridor.

One counter-signal belongs here too, because leaving it out would be dishonest. Injury share runs the other way. The nine communities recorded injuries in 21.06 per cent of crashes, below the statewide 22.89 per cent and below the matched band’s 22.68. More of their crashes are fatal; fewer of them produce a recorded injury. Both are true.

Answer Capsule

Route 20 is the longest road in Massachusetts, running about 153 miles from Hancock on the New York line to Kenmore Square in Boston, and it is the only corridor in this series whose communities record a fatality rate above the state average. MassDOT crash records place a Route 20 segment among the eight highest-crash roads in nine communities: Shrewsbury, Charlton, Pittsfield, Wilbraham, Millbury, Auburn, Northborough, Oxford and Sturbridge. Those entries total 234 crashes in 2024, a figure that is a floor rather than a count because MassDOT records the same road both with and without its route number. Across 2022 to 2024 the nine communities recorded 43 fatal crashes on 14,031 total, a rate of 3.06 per 1,000 against 2.68 statewide and 2.74 for the 103 Massachusetts towns in the same crash-volume band, so most of the gap survives size-matching while resting on a small number of events. Charlton is the concentration case, with five of its eight highest-crash roads being Route 20 segments totalling 76 of 126 crashes, and the highest fatality rate of the nine at 6.3 per 1,000. The exposure finding is larger and more consistent: the nine communities record 5.70 bicycle and 7.84 pedestrian crashes per 1,000 against 10.45 and 11.41 for matched towns, falling to 2.67 and 4.72 once Pittsfield is excluded. Two Massachusetts statutes fit that profile: M.G.L. c. 90, sec. 17, which forbids a speed “greater than is reasonable and proper” and makes 40 miles per hour for a quarter mile prima facie unreasonable on an undivided way outside a thickly settled district, and M.G.L. c. 89, sec. 8, which 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.” This is general information about Massachusetts law and public crash data, not legal advice.

The Finding That Survives Everything

The exposure numbers are where the picture becomes unambiguous.

Rate per 1,000 crashes	The nine Route 20 towns	103 matched towns	Massachusetts
Fatal crashes	3.06	2.74	2.68
Bicycle crashes	5.70	10.45	10.75
Pedestrian crashes	7.84	11.41	14.76

The Route 20 communities record roughly half the bicycle crash rate and about two thirds the pedestrian crash rate of comparable towns. Take out Pittsfield, the only real city in the set and the one that contributes 50 of the group’s 80 bicycle crashes and 57 of its 110 pedestrian crashes, and the remaining eight communities fall to 2.67 bicycle and 4.72 pedestrian crashes per 1,000. That is a quarter and a third of the state rate.

Read those two rows together and the corridor’s character is plain. These are places where almost nobody is walking or cycling near the arterial, and where the crashes that do happen are more likely to kill someone. That is not a road with a pedestrian problem. It is a road built for speed running through towns that were not, with driveways, side streets and farm entrances opening directly onto it.

These are town-level figures, not Route 20 segment figures. MassDOT does not publish fatality or vulnerable-road-user counts road by road, so what the table describes is the nine communities rather than their Route 20 miles specifically. The pattern is consistent enough across nine separate towns to be worth reporting, and it is stated as what it is.

Charlton Is the Concentration Case

If you want to see what a corridor town looks like in the raw data, look at Charlton.

Five of the eight roads on Charlton’s 2024 top-crash list are Route 20 segments. Worcester Road recorded as Route 20 at 31 crashes. The intersection where Worcester Road meets Southbridge Road, Route 169, at 14. Sturbridge Road as Route 20 at 12. Worcester Road westbound at 10 and eastbound at 9. Together those five entries are 76 of the 126 crashes on the town’s entire top-eight list, or 60.3 per cent. The three remaining entries are Stafford Street at 24, the eastbound Massachusetts Turnpike at 15 and Brookfield Road at 11.

In Charlton, Route 20 is not one of the town’s problems. It is most of them. And the town’s fatal rate, 6.3 per 1,000, is the highest of the nine.

Millbury shows the same ratio for a different reason. Five of its eight entries mention Route 20, but all five are Turnpike ramps and connector segments at three to five crashes apiece, and the town’s whole top-eight list totals only 28 crashes. Millbury is an interchange rather than a corridor town, and its fatal rate, 1.2 per 1,000, is among the lowest in the state.

The contrast between those two towns, seven miles apart on the same road, is the whole argument for reading crash data by community rather than by road name.

The Speed Statute That Actually Applies Out There

An undivided arterial through open country is the exact situation Massachusetts wrote a specific rule for, and it is not the rule most people think it is.

M.G.L. c. 90, sec. 17 opens with a standard rather than a number: “No person operating a motor vehicle on any way shall run it at a rate of speed greater than is reasonable and proper, having regard to traffic and the use of the way and the safety of the public.” Everything else in the section is evidence toward that standard.

Where a road is not otherwise posted, the statute makes it “prima facie evidence of a rate of speed greater than is reasonable and proper” to exceed 50 miles per hour for a quarter mile on a divided highway outside a thickly settled or business district, or to exceed 40 miles per hour for a quarter mile “on any other way outside a thickly settled or business district”. Route 20 between the Worcester County towns is precisely that second category: not divided, not thickly settled, and carrying traffic that behaves as though it were a highway because for long stretches it looks like one.

Two features of that section matter more in a crash case than the numbers do.

The first is that these thresholds are prima facie evidence, not conclusive proof. A driver under the threshold is not automatically safe and a driver over it is not automatically liable. The question the statute actually asks is whether the speed was reasonable and proper in the conditions, and a jury answers it.

The second is the sentence that follows the posted-limit rule, and it is the one most likely to decide a rural arterial case. Even where a speed limit has been properly established, “notwithstanding such establishment of a speed limit, every person operating a motor vehicle shall decrease the speed of the same when a special hazard exists with respect to pedestrians or other traffic, or by reason of weather or highway conditions.” A posted 45 is not permission to drive 45 in fog, in ice, behind a school bus, or approaching a farm stand with cars pulling out of it. On a road where the hazards are driveways and weather rather than congestion, that sentence carries most of the weight.

The section also doubles the fine for exceeding the posted limit, or driving at a speed greater than is reasonable and proper, “through the parameters of a marked construction zone or construction area”. A road as long as Route 20 is under construction somewhere in most years.

The Turn That Causes These Crashes

On a divided highway, crashes are mostly rear-end and lane-change events. On an undivided arterial, the dangerous manoeuvre is crossing the oncoming lane, and Massachusetts has a rule for it that is stricter than most drivers realise.

M.G.L. c. 89, sec. 8 provides that “any operator 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.”

Read what that does and does not say. It is not a rule about who arrived first, and it is not a rule that a green light satisfies. The obligation is to yield until the turn can be made with reasonable safety, and it belongs entirely to the turning driver. A turn made in front of oncoming traffic that then could not stop was not a turn made with reasonable safety, whatever the light was doing.

The same section carries the general intersection rule that when two vehicles arrive “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”, and the rotary rule that an entering driver yields to a vehicle already in the intersection. Charlton’s crash record includes an entry for the intersection of Worcester Road, Route 20, and Southbridge Road, Route 169, at 14 crashes in a single year, which is the sort of place these two rules meet in practice.

None of this makes a case by itself. Fault in Massachusetts is apportioned, and a turning driver who was struck by someone travelling well above a reasonable speed is not automatically the only party at fault. The way that division actually works is on our page about comparative negligence and partial fault.

If a Crash Happens on This Corridor

The practical steps are the same anywhere, but two of them matter more on a rural arterial than they do in a city.

Get the crash reported and get the report number. Massachusetts requires an operator’s crash report in defined circumstances, and the details, including the deadline, are on our page about reporting a car accident in Massachusetts.

Photograph the road, not only the vehicles. On a corridor where sightlines, driveway placement, shoulder width and signage are frequently the substance of the case, the scene changes by the next season and nobody goes back for it.

Get the speed question documented early. On a road where the prima facie threshold under c. 90, sec. 17 is 40 miles per hour outside a thickly settled district, whether the posted limit was 40, 45 or 50 at that particular point is a fact worth establishing before anyone’s memory of it hardens.

And keep the deadline in view. For an ordinary negligence claim the limit is generally three years, and the full set of deadlines by claim type is in the Massachusetts statute of limitations for every claim.

The Rest of the Corridor Series

Route 20 crosses several of the counties and corridors already covered here, and the views overlap usefully. Seven of the nine communities are in Worcester County, covered in the Worcester County crash data. Wilbraham is in Hampden County, covered in the Hampden County crash data, where Boston Road appears in both Wilbraham and Springfield. Pittsfield sits in the Western Massachusetts crash data. For the limited-access highway that runs parallel to Route 20 across the same towns, see the Massachusetts Turnpike crash data; for the highway through Worcester that Shrewsbury, Auburn and Northborough also carry, see the Interstate 290 crash data; and for the other long east-west surface road in the same county, see the Route 9 crash data. For the road-name finding that cuts across all of these, see which road has the most crashes in Massachusetts.

The corridor’s two anchor cities each have their own page for crash claims: Worcester, where Route 20 crosses the county seat’s road network and Main Street records the highest single-road count in the state, and Springfield, immediately west of the Wilbraham segment where Boston Road carries the route.

Frequently Asked Questions

Q: How dangerous is Route 20 in Massachusetts?

A: Measured by fatality rate, the nine communities where MassDOT records a Route 20 segment among their highest-crash roads run 3.06 fatal crashes per 1,000 across 2022 to 2024, against 2.68 statewide and 2.74 for Massachusetts towns of similar crash volume. That is the only corridor covered in this series where the rate runs above the state average. The margin is real but modest, and it rests on 43 fatal crashes, a small enough number that a few events move it.

Q: Which Massachusetts town has the worst Route 20 crash concentration?

A: Charlton. Five of the eight roads on its 2024 top-crash list are Route 20 segments, and together they account for 76 of the 126 crashes on that list, or 60.3 per cent. Charlton also recorded the highest fatality rate of the nine communities, 11 fatal crashes on 1,751 total, or 6.3 per 1,000.

Q: How many crashes happen on Route 20 in Massachusetts each year?

A: The town top-road lists record 234 crashes on Route 20 segments in 2024 across nine communities. That figure is a floor rather than a count, because MassDOT records the same road with and without its route number: Wilbraham’s Boston Road and Oxford’s Southbridge Road each appear both ways, and the unnumbered entries are not included here. Each town’s list also stops at eight roads, so towns where Route 20 ranks ninth are not counted at all.

Q: What is the speed limit on Route 20 in Massachusetts?

A: It varies by segment and is set by posting. Where a stretch is not otherwise posted, M.G.L. c. 90, sec. 17 makes it prima facie evidence of an unreasonable speed to exceed 40 miles per hour for a quarter mile on an undivided way outside a thickly settled or business district. That is evidence rather than a conclusion, and the same section requires every driver to decrease speed when a special hazard exists because of pedestrians, other traffic, weather or highway conditions, whatever the posted limit says.

Q: Who is at fault in a left-turn crash on a Massachusetts arterial?

A: M.G.L. c. 89, sec. 8 puts the obligation on the turning driver, who “shall, before turning, yield the right-of-way until such time as the left turn can be made with reasonable safety.” A green light does not satisfy that duty. It is not automatically the whole story either, because Massachusetts apportions fault, and an oncoming driver travelling at a speed that was not reasonable and proper can carry a share of it.

Q: Do Route 20 towns have a pedestrian problem?

A: The data says the opposite, and strikingly so. The nine communities record 7.84 pedestrian crashes and 5.70 bicycle crashes per 1,000, against 11.41 and 10.45 for comparable towns and 14.76 and 10.75 statewide. Excluding Pittsfield, the only city in the group, the remaining eight fall to 4.72 and 2.67. Very few people are walking or riding near this corridor, which is part of why the crashes that do occur there are more often fatal.

Q: Is Route 20 the longest road in Massachusetts?

A: US Route 20 runs about 153 miles inside Massachusetts, entering from New York at Hancock in the Berkshires and ending at Route 2 in Kenmore Square in Boston. That is longer than any other single route in the Commonwealth, including the Massachusetts Turnpike it parallels for most of its length. Nationally it is the longest road in the United States at roughly 3,254 miles, running from Newport, Oregon to Boston. That length is why its crash record is distributed rather than concentrated, and why it appears nowhere on the statewide list of individual highest-crash roads despite crossing so much of the state.

Q: Where does this crash data come from?

A: MassDOT IMPACT Open Crash Data, the Commonwealth’s public record of crashes reported to the Registry of Motor Vehicles. Town totals here cover 2022 through 2024 combined; road-level counts are 2024 only. Fatal, bicycle and pedestrian counts are published at town level rather than by road, so every rate in this article describes the nine communities rather than their Route 20 miles specifically. The records carry no traffic volume, so they cannot separate a road that is more dangerous from a road that is busier.

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. Whether any of it bears on a particular crash depends on facts a general article cannot see. To discuss a specific situation, call Jim Glaser Law at (617) JIM-WINS. The line is answered 24 hours a day. The first telephone consultation is free.

Talking to a Lawyer

The reason a corridor like this is worth writing about is not that the road is uniquely dangerous. It is that the crashes on it are a different kind of crash from the ones a highway produces, and the law that governs them is different too. A rear-end collision in stopped traffic on Interstate 93 turns on following distance. A crash where a car turned left out of a driveway on Route 20 in Charlton turns on the yield duty in c. 89, sec. 8 and on whether the oncoming speed was reasonable and proper under c. 90, sec. 17. Those are different investigations, and they need different evidence gathered at different times.

Jim Glaser Law takes calls about Massachusetts crashes, including crashes on Route 20. The full crash record for each of the nine corridor communities is published here: Shrewsbury, Charlton, Auburn, Oxford, Sturbridge, Northborough, Millbury, Wilbraham and Pittsfield. For every other town in the Commonwealth, start at the Massachusetts crash report. The line at (617) JIM-WINS is answered 24 hours a day. The first telephone consultation is free.