Regulations for the Display of a USDOT Number | Location and Size Requirement

The US Department of Transportation requires carriers operating in interstate commerce to display their name and USDOT number on both sides of the power unit (cab or vehicle door) before putting them into service. The lettering must be bold and contrasting to the color of the surface the lettering is applied to. The minimum lettering height for USDOT compliance is 2". (Click here to order 2" USDOT lettering.). We recommend going as large as possible while remaining aesthetically pleasing to avoid any potential issues. 

To ensure USDOT compliance, you must...
  • Display your USDOT issued number on both sides of the power unit. The vehicle door is the most common place to apply your vinyl graphics or magnetic signs. 
  • Lettering must be bold and contrast the painted surface of the vehicle or power unit. 
Lettering height should be a minimum of 2" tall, which is the absolute minimum for the dot numbers to be visible from 50 feet away. 

Suggested products to make your truck or logistics vehicle USDOT compliant:

us dot vinyl number sticker with company name and MC number
All you need in one, ready to go graphic! Free installation tool included. $32.00 ea. Combine your company name and city origin with your compliance numbers. $22.50 ea.
Order now
To view additional information regarding marking of large trucks for USDOT compliance, visit https://www.fmcsa.dot.gov/newsroom/new-rule-marking-large-trucks-ease-identification-improve-safety

We have taken some of the headache out of searching for USDOT number display regulations by state. USDOT Regulations by state. Click on the state your company is located in or states you will be driving through to view state-specific US Department of Transportation regulations. 
Alabama
Alaska
Arizona
Arkansas
California
Colorado
Connecticut
Delaware
Florida
Georgia
Hawaii
Idaho
Illinois
Indiana
Iowa
Kansas
Kentucky
Louisiana
Maine
Maryland
Massachusetts
Michigan
Minnesota
Mississippi
Missouri
Montana
Nebraska
Nevada
New Hampshire
New Jersey
New Mexico
New York
North Carolina
North Dakota
Ohio
Oklahoma
Oregon
Pennsylvania
Rhode Island
South Carolina
South Dakota
Tennessee
Texas
Utah
Vermont
Virginia
Washington
West Virginia
Wisconsin
Wyoming


To look up your company's USDOT number, please visit the following link. 
https://safer.fmcsa.dot.gov/CompanySnapshot.aspx

Need to apply for your KYU number?Visit https://drive.ky.gov/motor-carriers/Pages/KYU.aspx

For those that transport hazardous materials, please review the following for information regarding the display of hazmat placards. 
https://www.fmcsa.dot.gov/regulations/hazardous-materials/hazardous-materials-markings-labeling-and-placarding-guide-dot-chart

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