| Abbreviation | Definition |
|---|---|
| DTI | Detroit Toledo Ironton R. R. |
| DTI | Detroit, Toledo and Ironton Railroad |
| DTI | Detroit, Toledo and Ironton Railroad (Canadian National Railway) |
| DTI | Detroit, Toledo, and Ironton |
| DTI | Detroit, Toledo, Ironton |
| DTI | Grand Trunk Western Railroad Incorporated (formerly Detroit, Toledo, and Ironton Railroad Company) |
| DTIZ | Detroit, Toledo and Ironton Railroad (Canadian National Railway) |
| DTIZ | Grand Trunk Western Railroad Incorporated |
| DTL | Direct To Locomotive |
| DTLX | Delta Tank Line |
| DTLX | Delta Tank Line Company |
| DTRR | Danbury Terminal Railroad (Housatonic Railroad) |
| DTRR | Housatonic Rail Road Company |
| DTRS | Digital Train Radio System |
| DTS | Dallas, Tyler, and Shreveport |
| DTS | Detroit and Toledo Shore Line Railroad (Canadian National Railway) |
| DTS | Grand Trunk Western Railroad Incorporated |
| DTTX | Trailer Train (TTX Corporation) |
| DTTX | TTX Company |
| DTZZ | Direct Transit |