| Abbreviation | Definition |
|---|---|
| DPLX | Davenport Cement |
| DPRS | Distributed Power Rolling Stock |
| DPRT | Deer Park Rail Terminal |
| DPSU | Dart Portable Storage |
| DQE | De Queen and Eastern Railroad |
| DQE | De Queen and Eastern Railroad Incorporated |
| DR | Dardanelle and Russellville Railroad |
| DR | Dardanelle and Russellville Railroad Incorporated |
| DRAX | DRAYCUTT Corporation |
| DRBU | DRT Transportation |
| DRCX | Denver Railway Car Company (Martin Marietta Corporation) |
| DRDX | The Duredo |
| DREX | ProTrade Steel |
| DRG | Denver and Rio Grande Railroad |
| DRG | Drayton Green railway station |
| DRGW | Denver and Rio Grande Western Railroad (Union Pacific Railroad) |
| DRGW | Union Pacific Railroad Company |
| DRGX | Denver and Royal Gorge Railway |
| DRHY | Durham Transport |
| DRHY | Durham Transport Incorporated |