ISIC REV. 4 · GROUP 421
Construction of roads and railways
Activity scope
Construction of roads and railways
This activity belongs to Construction / Civil engineering. The classification describes economic activities; company inclusion still requires a qualifying business record.
Browse Civil engineering companiesCompany records are currently classified at division level. These results cover the broader division, not confirmed matches to this specific activity.
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Classification source
United Nations Statistics Division, ISIC Revision 4. Official English structure retrieved October 3, 2026. Broad navigation labels are simplified by COMPANY CORE.
View official classification structureRevision 5 is a separate standard. This directory keeps Revision 4 identifiers for compatibility with its existing records.