Maximum legal vehicle size and weight limits by US state
For each US state, the maximum legal dimensions and gross weight a vehicle plus load may have on state highways before an oversize/overweight permit is required, from the state's own vehicle code or DOT/DMV page: width, height, semitrailer length, combination length, and gross weight. Height genuinely fragments — 13 feet 6 inches in most eastern states (Florida, Ohio), 14 feet in western states (Washington) — so a load legal in one state needs a permit in the next. Answers 'how tall can a truck be in [state]', 'what is the maximum legal trailer length in [state]', and 'at what point do I need an oversize permit in [state]'. Values verbatim from statute or the agency page; the many exceptions (auto transporters, safety devices, RVs) stay in the source quote, not in extra fields.
1 record where two or more sources state different values. Both sides are reproduced on the record page, each with its own source and quote.
The data
| State | Oversize permit trigger | Statute / authority citation | Maximum width | Maximum height | Maximum semitrailer length | Maximum gross weight |
|---|---|---|---|---|---|---|
| California | loads greater than 8'-6" wide, 14'-0" high, and over 80,000 pounds. | Caltrans Transportation Permits | ||||
| Florida | Fla. Stat. 316.515 | 102 inches | 13 feet 6 inches | 48 feet | ||
| Ohio | ORC 5577.05 | One hundred two inches, including load | thirteen feet six inches | Fifty-three feet | ||
| Texas | TxDMV Texas Size/Weight Limits | 8'6" | 14’ | 59 feet | 80,000 pounds | |
| Washingtonsources differ | RCW 46.44.020 | fourteen feet |
Where this came from
Every record above links the page it was taken from and quotes the sentence that states it. These are the 7 sources this dataset was assembled from.
- dot.ca.govhttps://dot.ca.gov/programs/traffic-operations/transportation-permits
- leg.state.fl.ushttp://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0300-0399/0316/Sections/0316.515.html
- codes.ohio.govhttps://codes.ohio.gov/ohio-revised-code/section-5577.05
- txdmv.govhttps://www.txdmv.gov/motor-carriers/oversize-overweight-permits/texas-size-weight-limits
- app.leg.wa.govhttps://app.leg.wa.gov/RCW/default.aspx?cite=46.44.030
- app.leg.wa.govhttps://app.leg.wa.gov/RCW/default.aspx?cite=46.44.010
- app.leg.wa.govhttps://app.leg.wa.gov/RCW/default.aspx?cite=46.44.020
Machine-readable
- data.jsonThe whole dataset — every record with its source URL and source quote.
- Open Knowledge Format bundleOne JSON object per line — every record's frontmatter and quoted span exactly as it is held here, in one fetch.
- How this is made and checkedWhat "verified against source" does and does not mean.