NAICS Code 237310 — Highway, Street, and Bridge Construction

National Industry in the official 2022 North American Industry Classification System (U.S. Census Bureau). It is the only national industry under 23731 (Highway, Street, and Bridge Construction).

Code	237310
Title	Highway, Street, and Bridge Construction
Level	National Industry (6-digit)
Edition	NAICS 2022 edition
SBA size standard	$45 million in average annual receipts

Official definition (2022 NAICS)

This industry comprises establishments primarily engaged in the construction of highways (including elevated), streets, roads, airport runways, public sidewalks, or bridges. The work performed may include new work, reconstruction, rehabilitation, and repairs. Specialty trade contractors are included in this industry if they are engaged in activities primarily related to highway, street, and bridge construction (e.g., installing guardrails on highways).

Illustrative Examples:

Airport runway construction

Highway line painting

Causeway construction

Painting traffic lanes or parking lot lines

Culverts, highway, road, and street, construction

Pothole filling, highway, road, street, or bridge

Elevated highway construction

Resurfacing, highway, road, street, or bridge

Guardrail construction

Sign erection, highway, road, street, or bridge

Is a business under 237310 "small"?

Under the SBA size standards (13 CFR 121.201, effective March 17, 2023), a business classified in NAICS 237310 qualifies as a small business if it does not exceed $45 million in average annual receipts. Small-business status determines eligibility for federal set-aside contracts, SAM.gov certifications and SBA loan programs — receipts are averaged over the latest 5 fiscal years.

Where 237310 sits in the hierarchy

Level	Code	Title
Sector	23	Construction
Subsector	237	Heavy and Civil Engineering Construction
Industry Group	2373	Highway, Street, and Bridge Construction
NAICS Industry	23731	Highway, Street, and Bridge Construction
National Industry	237310	Highway, Street, and Bridge Construction

Related SIC codes

Via the official U.S. Census concordance (1987 SIC ↔ NAICS), shown only where the industry definition is unchanged in NAICS 2022.

SIC code	Title
1611	Highway and Street Construction, Except Elevated Highways
1622	Bridge, Tunnel, and Elevated Highway Construction
1721	Painting and Paper Hanging
8741	Management Services

Data: official 2022 NAICS structure, descriptions and Census concordances, U.S. Census Bureau — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.