State law chart
Trailer Brake Laws by State: Full 50-State Threshold Chart
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Quick answer
42 of the 50 states in this dataset set a numeric weight above which a towed trailer needs its own brakes, and 31 of them use 3,000 lb. The rest rely on a performance rule with no weight (5 states) or a rule tied to the trailer type (3). Most numeric thresholds are measured on the trailer's actual gross weight, 5 on its GVWR and 2 on its empty weight, so the same trailer can need brakes in one state and not the next.
Trailer brake weight threshold by state
| State | Threshold | Basis | Last verified |
|---|---|---|---|
| Alabama | 3,000 lb | gross weight | 2026-07-13 |
| Alaska | 5,000 lb | GVWR | 2026-07-13 |
| Arizona | 3,000 lb | gross weight | 2026-06-18 |
| Arkansas | 3,000 lb | gross weight | 2026-07-13 |
| California | 1,500 lb | gross weight | 2026-06-18 |
| Colorado | 3,000 lb | gross weight | 2026-07-13 |
| Connecticut | 3,000 lb | GVWR | 2026-07-13 |
| Delaware | 4,000 lb | gross weight | 2026-07-13 |
| Florida | 3,000 lb | gross weight | 2026-06-18 |
| Georgia | 3,000 lb | gross weight | 2026-07-13 |
| Hawaii | 3,000 lb | gross weight | 2026-07-13 |
| Idaho | 1,500 lb | unladen weight | 2026-07-13 |
| Illinois | 3,000 lb | gross weight | 2026-07-13 |
| Indiana | 3,000 lb | gross weight | 2026-07-13 |
| Iowa | 3,000 lb | gross weight | 2026-07-13 |
| Kansas | Performance rule | performance rule | 2026-07-13 |
| Kentucky | Performance rule | performance rule | 2026-07-13 |
| Louisiana | 3,000 lb | gross weight | 2026-07-13 |
| Maine | 3,000 lb | gross weight | 2026-07-13 |
| Maryland | 3,001 lb | GVWR | 2026-07-13 |
| Massachusetts | 10,000 lb | unladen weight | 2026-07-13 |
| Michigan | 3,000 lb | gross weight | 2026-07-13 |
| Minnesota | 3,000 lb | gross weight | 2026-07-13 |
| Mississippi | 2,000 lb | gross weight | 2026-07-13 |
| Missouri | Trailer-type rule | trailer-specific rule | 2026-07-13 |
| Montana | 3,000 lb | gross weight | 2026-07-13 |
| Nebraska | 3,000 lb | gross weight | 2026-07-13 |
| Nevada | 1,500 lb | gross weight | 2026-07-13 |
| New Hampshire | 3,000 lb | gross weight | 2026-07-13 |
| New Jersey | 3,000 lb | GVWR | 2026-07-13 |
| New Mexico | 3,000 lb | gross weight | 2026-07-13 |
| New York | 3,000 lb | GVWR | 2026-07-13 |
| North Carolina | 4,000 lb | gross weight | 2026-07-13 |
| North Dakota | Trailer-type rule | trailer-specific rule | 2026-07-13 |
| Ohio | Trailer-type rule | trailer-specific rule | 2026-07-13 |
| Oklahoma | 3,000 lb | gross weight | 2026-07-13 |
| Oregon | Performance rule | performance rule | 2026-07-13 |
| Pennsylvania | 3,000 lb | gross weight | 2026-07-13 |
| Rhode Island | 4,000 lb | gross weight | 2026-07-13 |
| South Carolina | 3,000 lb | gross weight | 2026-07-13 |
| South Dakota | 3,000 lb | gross weight | 2026-07-13 |
| Tennessee | 3,000 lb | gross weight | 2026-07-13 |
| Texas | 4,500 lb | gross weight | 2026-07-13 |
| Utah | Performance rule | performance rule | 2026-07-13 |
| Vermont | 3,000 lb | gross weight | 2026-07-13 |
| Virginia | 3,000 lb | actual weight | 2026-07-13 |
| Washington | 3,000 lb | gross weight | 2026-07-13 |
| West Virginia | 3,000 lb | gross weight | 2026-07-13 |
| Wisconsin | 3,000 lb | gross weight | 2026-07-13 |
| Wyoming | Performance rule | performance rule | 2026-07-13 |
Thresholds and bases are transcribed from the official sources linked on each state page. Statutes change; confirm before relying on a figure for a trip.
GVWR vs actual weight changes the answer
A trailer rated at 3,500 lb GVWR but loaded to 2,600 lb is under a 3,000 lb actual-weight threshold and over a 3,000 lb GVWR threshold. If your route crosses both kinds of state, plan around the stricter reading. The basis column in the chart below tells you which measure each state uses, and the state page quotes the statute.
States with a performance rule
5 states set no weight number at all. Instead they set a stopping-performance standard for the whole combination, or require only that the combination has working brakes somewhere. A heavy trailer may need its own brakes to meet that, but the law does not say at what weight that starts. Those states show as a performance rule in the chart.
Brakes are only one of three requirements
Brake thresholds usually come with two related rules: a breakaway system that applies the trailer brakes if it separates, and safety chains. In this dataset 35 states have a breakaway requirement on file and 39 have a safety-chain requirement. Some states that require brakes do not require a breakaway system, so check both on the state page rather than assuming one follows from the other. States whose rule has not yet been read from a statute are marked as needing verification, not as having no rule.
How to use this chart
Find the states on your route, take the strictest threshold among them, and compare it with the right number for your trailer: its loaded weight on a scale for gross-weight states, the GVWR on its certification label for GVWR states. Then open the individual state pages for the statute citations and the breakaway and chain details. The route planner does this for a whole multi-state trip at once.
Worked example
Worked example (hypothetical): a 3,400 lb loaded utility trailer crossing three states
A trailer with a 5,000 lb GVWR, loaded to 3,400 lb, driven from a state with a 4,500 lb gross-weight threshold, through a state with a 3,000 lb gross-weight threshold, into a state that measures 3,000 lb on GVWR. The states are illustrative; check the real ones on your route in the chart.
| Line item | Weight | Where the number comes from |
|---|---|---|
| Trailer GVWR | 5,000 lb | From the trailer's certification label |
| Actual loaded weight | 3,400 lb | Scale ticket |
| State A — 4,500 lb gross weight | No brakes required | 3,400 lb is under the threshold |
| State B — 3,000 lb gross weight | Brakes required | 3,400 lb is over the threshold |
| State C — 3,000 lb GVWR | Brakes required | 5,000 lb GVWR is over the threshold, however it is loaded |
| Plan against | Brakes required | The strictest state on the route governs the trip |
Unloading to 2,900 lb would satisfy State B but not State C, because State C reads the label rather than the scale. On a multi-state route, equip for the strictest rule you will cross.
Frequently asked questions
What weight requires trailer brakes in most states?
3,000 lb is the most common threshold: 31 of the 50 states in this dataset use it. Numeric thresholds in the dataset range from 1,500 lb to 10,000 lb.
Does the threshold use trailer GVWR or actual weight?
It depends on the state. In this dataset 5 states read the GVWR on the trailer's label, 2 use empty (unladen) weight, and most of the rest use the actual gross weight. The basis column in the chart shows which applies.
Which state's law applies when I cross state lines?
The law of the state you are driving through applies while you are in it. On a multi-state route, equip for the strictest requirement you will meet.
Do rental trailers already meet these rules?
Not necessarily. Small rental trailers often have no brakes at all. Check the trailer's label and compare it with the threshold for every state on your route.