# USDOT vehicle decals that pass the rules, ready to print

USDOT number decals sized and contrasted to be readable from the road. Describe it, and SI designs it with you; the studio checks the rules before you export.

Design yours free: https://labelmaker.si/studio/?product=vehicle_decal&rules=vehicle_dot

## What USDOT vehicle decals need

- **Name and USDOT number on both sides** (you confirm): Legal or DBA name plus “USDOT” and the number, on both sides of the power unit.
- **Readable from 50 ft in daylight** (checked automatically): Contrasting color; letters large enough to read from 50 ft (2 in is the common minimum).

Summarized from 49 CFR 390.21, 49 CFR 390.21(c). Requirements vary by market and product, so confirm the details for yours.

## Label types

- [Vehicle lettering & DOT numbers](https://labelmaker.si/studio/?product=vehicle_decal&rules=vehicle_dot): Fleet lettering and USDOT markings, both sides.

## Questions

**Is labelmaker.si free?** Designing is free and unlimited. When a design is ready, print-ready files are $2.99 each, or included with a plan.

**Does it check the labeling rules for USDOT vehicle decals?** Yes. The studio opens with Commercial vehicle markings (US) selected in Preflight and checks 2 rules before you export: Name and USDOT number on both sides; Readable from 50 ft in daylight. Rules it can't verify from the artwork are flagged for you to confirm.

**Do I need design skills?** No. Describe the label in plain words and SI, the studio's AI designer, sets up the product, size, art and text. You can also edit everything by hand.

**Where do I print it?** Anywhere: your own printer or cutter (Cricut, Silhouette, Roland, Zebra) or any print shop. You download print-ready PDF, SVG and cut-line files.

**Is my AI key safe?** Your AI key stays in your browser and goes straight to your own provider. labelmaker.si never receives or stores it.