SIC Code 4131 — Intercity and Rural Bus Transportation

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	4131
Title	Intercity and Rural Bus Transportation
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 4131

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
485210	Interurban and Rural Bus Transportation	485210 (same code)

Other SIC codes in 41xx

• 4111 — Local and Suburban Transit
• 4119 — Local Passenger Transportation, Not Elsewhere Classified
• 4121 — Taxicabs
• 4141 — Local Bus Charter Service
• 4142 — Bus Charter Service, Except Local
• 4151 — School Buses
• 4173 — Terminal and Service Facilities for Motor Vehicle Passenger Transportation

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.