Verified
Massachusetts Trailer Brake Laws: Required Over 10,000 lb
Massachusetts General Laws c.90 section 7 states every trailer or semitrailer having an unladen weight of more than 10,000 lb must be equipped with air or electric brakes. This is an unladen-weight rule, not a loaded-GVWR rule.
- Brake threshold
- 10,000lbunladen weight
- Breakaway switch
- Not recorded
- Safety chains
- Required
- Towing speed
- Posted limits
- Double towing
- Not recorded
On this page8 sections
Quick answer: 10,000 lb unladen weight
In Massachusetts, trailer brakes are currently listed at 10,000 lb (unladen weight). Massachusetts measures unladen weight, so the empty trailer weight is the figure to check.
Massachusetts trailer equipment rules
Breakaway switch
Needs verification
- Applies when
- Trailer type and weight may matter
- Source
- Verified
- Last checked
- 2026-07-13
Safety chains
Two safety chains must connect trailer and towing vehicle, one on each side of the central hitch, each entirely independent of the other and of the coupling, each with ultimate strength at least the gross weight of the trailer and its load. Vehicles governed by the federal requirements are excepted.
- Applies when
- Conventional trailer couplings
- Source
- 540 CMR 22.10
- Last checked
- 2026-08-21
Speed / lane rule
No towing-specific speed limit; follow posted limits.
- Applies when
- Posted roads and vehicle combinations
- Last checked
- 2026-08-21
Double towing
Needs verification with Massachusetts RMV/statutes.
- Applies when
- Multiple-trailer combinations
- Source
- Verified
- Last checked
- 2026-07-13
Read against the linked sources on . Statutes change and enforcement varies by trailer type — confirm before you tow.
Check your setup
This state uses an unladen or empty-trailer weight basis. The checker above uses your loaded weight as a conservative screen, but the official empty weight still needs manual verification.
Trailer Brake Gain CalculatorHow the 10,000 lb threshold applies to three trailers
Massachusetts measures unladen weight, so the empty weight of the trailer is what counts.
| Example trailer | Weight checked | Against 10,000 lb |
|---|---|---|
| Small utility trailer | 5,500 lb | Under the Massachusetts threshold by 4,500 lb |
| Loaded just under the line | 9,900 lb | Inside the Massachusetts limit, but one heavy load away from crossing it |
| Mid-size travel trailer | 16,000 lb | Over the Massachusetts threshold by 6,000 lb — brakes required |
How Massachusetts compares with neighbouring states
5 of the 5 states bordering Massachusetts set a stricter brake threshold, so a trailer that is legal here may need brakes as soon as you cross the line. Equip for the strictest state on your route.
| Bordering state | Brake threshold | Compared with Massachusetts |
|---|---|---|
| Connecticut | 3,000 lb GVWR | 7,000 lb stricter |
| New Hampshire | 3,000 lb gross weight | 7,000 lb stricter |
| New York | 3,000 lb GVWR | 7,000 lb stricter |
| Rhode Island | 4,000 lb gross weight | 6,000 lb stricter |
| Vermont | 3,000 lb gross weight | 7,000 lb stricter |
Planning a multi-state trip? The route brake law checker compares every state on a route at once.
Official source links
- M.G.L. c.90 section 7 brakes statute
- Mass.gov citable motor vehicle offenses public-safety
- MassDOT dot
Massachusetts towing law FAQ
Are trailer brakes required in Massachusetts?
Massachusetts currently lists a trailer brake threshold at 10,000 lb unladen weight. Always verify the official state source before towing.
What weight requires trailer brakes in Massachusetts?
The current data lists 10,000 lb unladen weight as the brake threshold.
Is a breakaway switch required in Massachusetts?
The breakaway-switch rule for Massachusetts needs verification with official state sources.
Are safety chains required in Massachusetts?
Two safety chains must connect trailer and towing vehicle, one on each side of the central hitch, each entirely independent of the other and of the coupling, each with ultimate strength at least the gross weight of the trailer and its load. Vehicles governed by the federal requirements are excepted. (540 CMR 22.10)
Can I tow two trailers in Massachusetts?
Needs verification with Massachusetts RMV/statutes.
Is there a towing speed limit in Massachusetts?
No towing-specific speed limit; follow posted limits. (Mass. Gen. Laws ch. 90, 17)
Does Massachusetts measure trailer weight as GVWR or actual weight?
Massachusetts uses unladen weight, so the empty weight of the trailer is the figure to compare against the threshold.
Where can I verify Massachusetts towing laws?
Start with the 3 official sources linked on this page, beginning with M.G.L. c.90 section 7 brakes. Prefer state DOT, DMV, legislature, or public-safety pages over summaries from private websites. This page was last checked on 2026-07-13.
Disclaimer: educational summary, not legal advice. Statutes and enforcement practice change — verify the Massachusetts sources linked above before towing.