| Naics index | Naics index description |
|---|---|
| 482111 | Railroads, line-haul |
| 482111 | Railway transportation, line-haul |
| 482112 | Beltline railroads |
| 482112 | Freight railways, short-line or beltline |
| 482112 | Logging railroads |
| 482112 | Railroad transportation, short-line or beltline |
| 482112 | Railroads, short-line or beltline |
| 482112 | Railway transportation, short-line or beltline |
| 482112 | Short-line railroads |
| 483111 | Deep sea freight transportation to or from foreign ports |