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Arkansas truck lettering requirements
Short answerWhat applies for certain in Arkansas is the federal rule, 49 CFR 390.21: your legal name or a single trade name and your USDOT number on both sides of the power unit, in a color that contrasts with the paint and legible from 50 feet in daylight. We are confirming the state statute text; until then, letter to the federal rule and ask the state agency if you only operate in-state.
Some details on this page come from agency guidance rather than the statute text and are being confirmed. The federal rule below applies regardless.
What Arkansas requires
| USDOT for intrastate carriers | We did not find Arkansas on FMCSA's lists of states that require intrastate carriers to have a USDOT number. Interstate carriers based in the state need one regardless. Confirm with the state agency before assuming you are exempt. |
|---|---|
| State number | None known. Name and USDOT per 390.21. |
| Printed format | Name and USDOT 1234567 |
| Size | No inch minimum; legible from 50 feet in daylight with sharp contrast (49 CFR 390.21). Two inch numbers is the standard. |
| Enforced by | Arkansas state police / commercial vehicle enforcement; state DOT |
| Sources | 49 CFR 390.21; FMCSA intrastate registration lists; state agency guidance (being confirmed) |
What the door looks like
Your Company LLC
USDOT 1234567
Also worth knowing
- Two inch numbers with the name a little larger pass the 50 foot test in every state.
- The MC number is not a marking requirement anywhere; add it if you want brokers to see it.
The federal rule underneath
49 CFR 390.21 applies to every commercial motor vehicle in interstate commerce: legal or single trade name, the letters USDOT and the number, both sides of the power unit, contrasting color, legible from 50 feet in daylight while parked. No federal inch minimum. The MC number is not a federal marking requirement, and trailers don't need markings. States add to this; they don't replace it.
Checked September 2026. Plain-English summary of the regulations, not legal advice. Rules change; the citations above are where to confirm.