Superload thresholds by state
The point at which a state stops issuing a permit over the counter and starts pricing the move by hand after an engineering review. 24 of the 51 covered states publish a gross-weight line; the rest define superload treatment qualitatively or on dimensions, and where that is so the cell says "none published" rather than inventing a cutoff.
| State | Gross weight | Width | Height | Length | Short axle spacing |
|---|---|---|---|---|---|
| Alabama | over 300,000 lbundated document · read | over 16'undated document · read | over 16'undated document · read | over 150'undated document · read | Not yet covered |
| Alaska | 250,000 lb or morerev. · read | over 18'rev. · read | over 18'rev. · read | over 150'rev. · read | Not yet covered |
| Arizona | Two official sources disagreeover 250,000 lb — versus — over 140,000 lb | over 14'rev. · read secondary host | over 16'rev. · read secondary host | over 120'rev. · read secondary host | Not yet covered |
| Arkansas | 180,000 lb or morerev. · read | over 16'6"rev. · read | 15'6" or morerev. · read | 100' or morerev. · read | Not yet covered |
| California | None published | over 15'undated document · read | over 17'undated document · read | over 135'undated document · read | Not yet covered |
| Colorado | over 200,000 lbundated document · read | over 17'rev. · read | None published | None published | Not yet covered |
| Connecticut | over 200,000 lbrev. · read | over 16'undated document · read | over 16'undated document · read | over 150'undated document · read | Not yet covered |
| Delaware | Two official sources disagreeover 120,000 lb — versus — 120,000 lb or more | 15' or morerev. · read | 15' or morerev. · read | 120' or morerev. · read | Not yet covered |
| District of Columbia | None published | None published | None published | None published | Not yet covered |
| Florida | None published | None published | None published | None published | Not yet covered |
| Georgia | over 180,000 lbrev. · read | None published | None published | None published | Not yet covered |
| Hawaii | None published | None published | None published | None published | Not yet covered |
| Idaho | over 250,000 lbrev. · read | None published | None published | None published | Not yet covered |
| Illinois | None published | None published | None published | None published | Not yet covered |
| Indiana | Three official sources disagreeover 200,000 lb — versus — over 108,000 lb — versus — over 120,000 lb | Four official sources disagreeover 17' — versus — over 16' — versus — over 16' — versus — over 17' | over 15'rev. · read | over 110'rev. · read | Not yet covered |
| Iowa | None published | None published | None published | None published | Not yet covered |
| Kansas | None published | None published | None published | None published | Not yet covered |
| Kentucky | over 160,000 lbrev. · read | None published | None published | None published | Not yet covered |
| Louisiana | over 254,000 lbrev. · read secondary host | None published | None published | None published | Not yet covered |
| Maine | None published | None published | None published | None published | Not yet covered |
| Maryland | By condition (2)
|
16' or morerev. · read | 16' or morerev. · read | 120' or morerev. · read | Not yet covered |
| Massachusetts | over 130,000 lbrev. · read | None published | None published | None published | Not yet covered |
| Michigan | None published | over 16'rev. · read | over 15'rev. · read | over 150'rev. · read | Not yet covered |
| Minnesota | over 250,000 lbrev. · read | over 16'rev. · read | over 16'rev. · read | over 150'rev. · read | Not yet covered |
| Mississippi | Two official sources disagreeover 189,999 lb — versus — 189,999 lb or more | over 17'rev. · read | over 15'7"rev. · read | over 121'rev. · read | Not yet covered |
| Missouri | over 160,000 lbrev. · read | over 16'rev. · read | over 16'rev. · read | over 150'rev. · read | Not yet covered |
| Montana | None published | over 18'rev. · read | over 17'rev. · read | over 150'rev. · read | Not yet covered |
| Nebraska | over 160,000 lbrev. · read | over 16'rev. · read | over 15'11"rev. · read | over 150'rev. · read | Not yet covered |
| Nevada | None published | None published | None published | None published | Not yet covered |
| New Hampshire | over 149,999 lbrev. · read | over 15'rev. · read | over 13'6"rev. · read | over 110'rev. · read | Not yet covered |
| New Jersey | None published | None published | None published | None published | Not yet covered |
| New Mexico | over 170,000 lbrev. · read | None published | None published | None published | Not yet covered |
| New York | 200,000 lb or morerev. · read | over 16'rev. · read | 16' or morerev. · read | Two official sources disagree160' or more — versus — over 160' | Not yet covered |
| North Carolina | over 132,000 lbrev. · read | Four official sources disagreeover 16' — versus — 17' or more — versus — over 16'11" — versus — over 16' | None published | None published | Not yet covered |
| North Dakota | None published | None published | None published | None published | Not yet covered |
| Ohio | over 120,000 lbundated document · read | over 14'undated document · read | over 14'6"undated document · read | None published | Not yet covered |
| Oklahoma | None published | None published | None published | None published | Not yet covered |
| Oregon | None published | By condition (2) | over 17'undated document · read | over 150'undated document · read | Not yet covered |
| Pennsylvania | over 201,000 lbrev. · read | over 16'rev. · read | None published | over 160'rev. · read | Not yet covered |
| Rhode Island | None published | None published | None published | None published | Not yet covered |
| South Carolina | over 130,000 lbrev. · read | None published | None published | None published | Not yet covered |
| South Dakota | None published | None published | None published | None published | Not yet covered |
| Tennessee | over 165,000 lbundated document · read | over 16'undated document · read | over 15'6"undated document · read | None published | Not yet covered |
| Texas | over 254,300 lbundated document · read | None published | None published | None published | 200,001 lb–254,300 lb on under 95 ft of axle spacingundated document · read |
| Utah | None published | None published | None published | None published | Not yet covered |
| Vermont | 150,000 lb or morerev. · read | 15' or morerev. · read | over 14'rev. · read | over 100'rev. · read | Not yet covered |
| Virginia | None published | over 15'rev. · read | over 15'rev. · read | over 150'rev. · read | Not yet covered |
| Washington | over 200,000 lbrev. · read | over 16'rev. · read | over 16'rev. · read | None published | Not yet covered |
| West Virginia | None published | None published | None published | None published | Not yet covered |
| Wisconsin | None published | None published | None published | None published | Not yet covered |
| Wyoming | None published | None published | None published | None published | Not yet covered |
The states without a jurisdiction file are listed here rather than dropped, and their cells say "not yet covered" rather than carrying a number from a secondary source. A table titled "every state" that quietly covers half is the weakness we are competing against; matching it would forfeit the only advantage this page has. What coverage means here →
It is not "over 80,000 lb"
A figure of "over 80,000 lb" circulates widely as the superload definition. It is the federal legal gross limit under 23 U.S.C. §127 — the point at which an overweight permit becomes necessary, not the point at which a state escalates a move to engineering review. The published gross-weight lines above sit between 150,000 lb or more and considerably higher, and treating 80,000 lb as the line misstates the threshold by a multiple on every state that publishes one.
How this is sourced
Every covered cell above is a value plus the document it came from. Two dates travel with it and they are not the same thing: rev. is the date the source document itself carries — a rule's stated effective date, a PDF's footer — and read is the date we retrieved it. A document downloaded this morning can still be five years old, and a single "last updated" stamp would hide exactly that.
Where two official documents that are both in effect give different answers, the cell says sources disagree and shows both, because neither has been adopted. That is not an omission; it is the finding. Where a state publishes no such limit at all, the cell says none published — also a finding, and a different one from not yet covered, which is our gap and nobody else's.
Questions
Is a superload anything over 80,000 lb?
No. 80,000 lb is the federal LEGAL gross limit on the Interstate — above it you need an overweight permit, which is an ordinary over-the-counter product in most states. A superload is a load the state will not issue over the counter at all, and the published thresholds in the table above run several times higher.
Can a load be a superload on size alone?
Yes. Several states escalate on width, height or length regardless of weight, which a weight-only check misses entirely — a very wide but comparatively light load can be a superload while a much heavier legal-width one is not.
Why do some states show a short-spacing trigger?
Because a heavy load on a short trailer is a different problem from a heavy load on a long one. Those states escalate a mid-range gross weight to superload treatment when the axle spacing is under a stated minimum — a rig a gross-weight-only check reads as ordinary.
What changes above the superload line?
There is usually no published fee. The agency prices the move after an engineering and route review, often with a bridge analysis, a route survey and escorts attached as conditions. Our calculator emits no priced lines for a superload rather than printing a number the state has not set.