| Abbreviation | Definition |
|---|---|
| IFV | Innovation Financing Vehicle |
| IGM | Import General Manifest |
| IGOR | Interactive Guidance On Routes |
| IGS | Instrument Guidance System |
| IGS | International GNSS (Global Navigation Satellite System) Service |
| IGT | Independent Gas Transportation |
| IGW | Increased Gross Weight |
| IHC | Inland Haulage Charges |
| IHC | Inland Haulauge Charge |
| IHT | Institution of Highways Transportation |
| IIA | Independent Inspection Agency |
| IIC | Investigator in Charge |
| IIT | Inter-Island Terminal (Honolulu Airport) |
| IIVS | Intel In Vehicle Solutions |
| IJT | International Journal of Transportation |
| ILA | International Longshoremen's Association |
| ILEV | Inherently Low Emission Vehicle |
| ILEV | Inherently Low Emission Vehicles |
| ILR | Intercity Long Range |
| ILST | Indonesian Low Speed Tunnel |