Datasets:

referencesource
/

truck-size-weight-limits-by-state

citation string	derived_fields list	id string	permit_trigger string	source string	source_quote string	state string	url string	verified_fields list	max_height string	max_semitrailer_length string	max_width string	max_gross_weight string	also_reported list	disagreements list
Caltrans Transportation Permits	[ "citation", "state" ]	california	loads greater than 8'-6" wide, 14'-0" high, and over 80,000 pounds.	https://dot.ca.gov/programs/traffic-operations/transportation-permits	Single Trip Permit (Single Trip I and Single Trip II) - loads greater than 8'-6" wide, 14'-0" high, and over 80,000 pounds.	California	https://referencesource.org/truck-size-weight-limits-by-state/california/	[ "permit_trigger" ]	null	null	null	null	null	null
Fla. Stat. 316.515	[ "citation", "state" ]	florida	null	http://www.leg.state.fl.us/statutes/index.cfm?App_mode=Display_Statute&URL=0300-0399/0316/Sections/0316.515.html	The total outside width of any vehicle or the load thereon may not exceed 102 inches, exclusive of safety devices determined by the department to be necessary for the safe and efficient operation of motor vehicles. The use of public roads that do not have at least one through lane of 12 feet or more in width in each di...	Florida	https://referencesource.org/truck-size-weight-limits-by-state/florida/	[ "max_height", "max_semitrailer_length", "max_width" ]	13 feet 6 inches	48 feet	102 inches	null	null	null
ORC 5577.05	[ "citation", "state" ]	ohio	null	https://codes.ohio.gov/ohio-revised-code/section-5577.05	(5) One hundred two inches, including load, for all other vehicles, except that the director may prohibit the operation of one hundred two-inch vehicles on such state highways or portions of state highways as the director designates. (C) No such vehicle shall have a length in excess of: (1) Sixty-six feet for passenger...	Ohio	https://referencesource.org/truck-size-weight-limits-by-state/ohio/	[ "max_height", "max_semitrailer_length", "max_width" ]	thirteen feet six inches	Fifty-three feet	One hundred two inches, including load	null	null	null
TxDMV Texas Size/Weight Limits	[ "citation", "state" ]	texas	null	https://www.txdmv.gov/motor-carriers/oversize-overweight-permits/texas-size-weight-limits	The following maximum dimensions may be operated on Texas’ highways without a permit . Width Passenger vehicle (and its load) - 8' All other vehicles (and loads) - 8'6" Height All vehicles: 14’ Length Vehicle Type \| Length Limit \| Single motor vehicle \| 45 feet \| Truck-tractor \| Unlimited \| Semitrailer, of two-vehicle ...	Texas	https://referencesource.org/truck-size-weight-limits-by-state/texas/	[ "max_gross_weight", "max_height", "max_semitrailer_length", "max_width" ]	14’	59 feet	8'6"	80,000 pounds	null	null
RCW 46.44.020	[ "citation", "state" ]	washington	null	https://app.leg.wa.gov/RCW/default.aspx?cite=46.44.020	It is unlawful for any vehicle unladen or with load to exceed a height of fourteen feet above the level surface upon which the vehicle stands.	Washington	https://referencesource.org/truck-size-weight-limits-by-state/washington/	[ "max_height" ]	fourteen feet	null	null	null	[ { "as_of": "2026-08-18T00:00:00", "field": "max_width", "source": "https://app.leg.wa.gov/RCW/default.aspx?cite=46.44.010", "source_quote": "The total outside width of any vehicle or load thereon must not exceed eight and one-half feet;", "value": "eight and one-half feet" }, { "as_of": ...	[]

Maximum legal vehicle size and weight limits by US state

Canonical, always-current version: https://referencesource.org/truck-size-weight-limits-by-state/ Machine-readable: https://referencesource.org/truck-size-weight-limits-by-state/data.json — this mirror is a point-in-time copy.

Last verified: 2026-08-18
Stale after: 2027-08-18 (past this date, prefer the canonical copy — it re-verifies on a cadence this snapshot does not)
Records: 5

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.

Provenance — what every record carries

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Licence position

unknown

Facts are not copyrightable; what this dataset takes from each source is a fact plus a short attributed quote linking back to the page that states it.

Sources

Fields

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