The short answer
Trucks that never leave Florida: Florida trucks that never leave the state need federal-style markings (name + USDOT number) at 26,001 lbs or more — counting GVWR, combined rating, OR actual weight, whichever crosses first. Under 26,001 and no placarded hazmat: exempt. Displaying a false or fraudulent identification number is a first-degree misdemeanor in Florida (316.302(12)).
Also in Florida: USDOT Number (placard-level hazmat); Legal / Trade Name (farm vehicle and 26,001 lbs or more).
Interstate trucks follow the federal rule: name and USDOT number on both sides of the power unit from 10,001 lbs (49 CFR 390.21T(b)(2)); other triggers in the federal box below.
✓ Verified 2026-07-24 against the sources below · next review 2027-01-20
The Florida rules in detail
USDOT Number + Legal / Trade Name
Required rules FL-INTRASTATE-USDOT, FL-INTRASTATE-NAME
| Who | Florida trucks that never leave the state |
|---|
| When (all of these) | 26,001 lbs or more |
|---|
| Except | farm vehicles |
|---|
| What goes on the truck | USDOT [your USDOT number] + [your company name] |
|---|
| Size and placement | Readable from 50 feet in daylight, no inch minimum (we cut 2-inch number, 3-inch name) · sharp contrast · both sides of the power unit |
|---|
Legal sources
- Fla. Stat. 316.302(1)(b) — intrastate CMV owners/drivers subject to 49 CFR 382-386 and 390-397 (as of Dec 31, 2023, which includes the operative 390.21T marking rule); 316.302(2)(f) — vehicles under 26,001 lbs (GVW, GVWR and GCWR), non-placarded, intrastate, are EXEMPT from those parts. Full section text read.
- Fla. Stat. 316.302(1)(b) — adoption of 49 CFR 390-397 for intrastate commerce includes the 390.21T name-display requirement (legal name or single trade name per MCS-150).
Verified 2026-07-24 · next review 2027-01-20
USDOT Number
Required rule FL-HAZMAT-USDOT
| Who | Florida trucks that never leave the state |
|---|
| When (all of these) | placard-level hazmat |
|---|
| What goes on the truck | USDOT [your USDOT number] |
|---|
| Size and placement | Readable from 50 feet in daylight, no inch minimum (we cut 2-inch number) · sharp contrast · both sides of the power unit |
|---|
Hauling placard-level hazmat in Florida? The 26,001-lb exemption doesn't apply — name and USDOT number are required at any weight.
Legal sources
- Fla. Stat. 316.302(2)(f) — the under-26,001 intrastate exemption applies only when NOT transporting placardable hazmat; a placarded hauler at any weight remains subject to 49 CFR 390-397 incl. marking. Full section text read.
Verified 2026-07-24 · next review 2027-01-20
Legal / Trade Name
Required rule FL-AG-NAME-CITY
| Who | Florida trucks that never leave the state |
|---|
| When (all of these) | farm vehicle · 26,001 lbs or more |
|---|
| What goes on the truck | [your company name] — [your city] |
|---|
| Size and placement | Readable from 50 feet, no inch minimum (we cut 3-inch name) · contrasting color · both sides of the power unit |
|---|
Florida farm trucks running under the agricultural exemption aren't off the hook: at 26,001+ lbs (or 3+ axles at any weight) the truck must display the owner's name AND home town, readable from 50 feet — a Florida-specific 'name + city' decal set.
Legal sources
- Fla. Stat. 316.302(2)(e) — vehicles under the intrastate agricultural exemption having GVW 26,001+ lbs OR 3+ axles on the power unit (regardless of weight) must display the name of the owner/motor carrier AND the municipality or town where based, each side, contrasting letters readable from 50 feet; penalty per 316.3025(3)(a). Full section text read.
Verified 2026-07-24 · next review 2027-01-20
Florida truck marking FAQ
Do I need a USDOT number on a truck that never leaves Florida?
Yes: 26,001 lbs or more (except farm vehicles); or placard-level hazmat (Fla. Stat. 316.302(1)(b); Fla. Stat. 316.302(2)(f)).
At what weight do the Florida marking rules start?
USDOT Number and Legal / Trade Name: from 26,001 lbs. USDOT Number (placard-level hazmat): no weight floor. Legal / Trade Name (farm vehicle and 26,001 lbs or more): from 26,001 lbs.
What goes on the door in Florida?
Florida rules spell it out: USDOT [your USDOT number]; [your company name]; USDOT [your USDOT number] (placard-level hazmat); [your company name] — [your city] (farm vehicle and 26,001 lbs or more).
Are farm trucks exempt in Florida?
USDOT Number and Legal / Trade Name: not required on farm vehicles. Legal / Trade Name: required on farm vehicles at 26,001 lbs or more.
Does hauling hazmat change the rules in Florida?
Yes: placard-level hazmat brings in the USDOT Number marking at any weight, per Fla. Stat. 316.302(2)(f).
General information, not legal advice. The agency above has the final word.