| Abbreviation | Designation | |
|---|---|---|
| Re | REGIOekspres (Polish) | train category |
| RE | RegioExpress (Schweiz) (Swiss German) | train category |
| RE | Regional-Express (Deutschland) (German) | train category |
| REX | RegionalExpress (Österreich) (German) | train category |
| RE | Recklinghausen Hbf, Stadt Recklinghausen (German) | fare point / vehicle registration plate |
| RE | RegioEkspres (Polish) | train category |
| RE | RegionalExpress (Deutschland) (German) | train category |