Transportation and Warehousing › Transit and Ground Passenger Transportation › Urban Transit Systems
Sector
Transportation and Warehousing
Subsector
Transit and Ground Passenger Transportation
Industry Group
Urban Transit Systems
National Industry (This Code)
Mixed Mode Transit Systems
Source: U.S. Census Bureau 2022 NAICS
Based on SBA Table of Small Business Size Standards (2024)
Size Standard
$29M average annual receipts
Measurement Period
3-year average
Standard Type
Revenue-Based
Applies To
All contracts under NAICS 485111
Set-Aside Programs
8(a), WOSB, HUBZone, SDVOSB
Certification Required
No (self-certify in SAM.gov)
Size standards are set by the SBA and reviewed periodically. Always verify at SBA.gov before bidding.
The following activities are classified elsewhere in the NAICS system:
NAICS code 485111 — Mixed Mode Transit Systems — is used in SAM.gov to identify businesses whose primary activity falls within this classification. When you add this code to your SAM.gov entity registration, contracting officers searching for vendors in the Urban Transit Systems space will be able to find your business.
If this code represents your primary business activity, designate it as your primary NAICS code. Your primary NAICS code determines your size standard for any contract solicited under this code. With a size standard of $29M average annual receipts, your business must be at or below this threshold to qualify as a small business for set-aside contracts under NAICS 485111.
NAICS code 485111 is 'Mixed Mode Transit Systems', classified under the Transportation and Warehousing sector (NAICS 48). This U.S. industry comprises establishments primarily engaged in operating local and suburban ground passenger transit systems using more than one mode of transport over regular routes and on regular
The SBA defines a small business under NAICS code 485111 (Mixed Mode Transit Systems) as one with $29M average annual receipts. This size standard determines eligibility for small business set-aside contracts, 8(a), HUBZone, WOSB, and SDVOSB programs in SAM.gov.
To register NAICS code 485111 in SAM.gov: (1) Log in at sam.gov, (2) Navigate to your Entity Registration, (3) Go to the Assertions section, (4) Add 485111 (Mixed Mode Transit Systems) to your NAICS code list. You may designate one code as your Primary NAICS code.
Other codes in Urban Transit Systems
PSC codes commonly used with this NAICS sector
Source: GSA PSC Manual April 2025
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