| Abbreviation | Definition |
|---|---|
| ID | Intersection Dimension |
| IDC | Instrument Drive Chassis |
| IDC | International Dispatch Center |
| IDCV | Intelligent Destination Coded Vehicle |
| IDDT | Irish Driver Driving Test |
| IDEAS | Innovations Deserving Exploratory Analysis Program |
| IDF | I Don't Fly |
| IDL | Interfacility Data Link |
| IDM | Injector Driver Module |
| IDO | 0stanbul Deniz Otobüsleri |
| IDO | İstanbul Deniz Otobüsleri |
| IDOT | International Delivery On Time |
| IDOT | Iowa Department of Transportation |
| IDOT | The Illinois Department Of Transportation |
| IDP | International Driving Permit |
| IDR | Inner Distribution Road |
| IDTT | Irish Driver Theory Test |
| IDV | Indefinite Delivery Vehicle |
| IEC | Island Eastern Corridor, Hong Kong |
| IEP | Intercity Express Program |