| Abbreviation | Definition |
|---|---|
| IMTS | Intelligent Multimode Transit System |
| IMV | Infantry Mobility Vehicle |
| IMVS | Individual Mobility Vehicles Services |
| INAT | Intermode Alarm Transport |
| IND | Indianapolis International Airport |
| INF | Inland Navigation Facility |
| INFRA | INFrastructure for Rebuilding America |
| INIA | Ibrahim Nasir International Airport |
| INS | Inertial Navigation System |
| INTI | Integrated Network of Tranportation Information |
| INTP | Interport Trucking |
| INVEST | Investing in a New Vision for the Environment and Surface Transportation |
| IO | INBOARD/ OUTBOARD |
| IOAN | Inspect |
| IOD | Ignition Off Draw |
| IOWA | In Omaha Without Approval |
| IPC | Instrument Panel Cluster |
| IPD | Implicit Price Deflector |
| IPDS | Integrated Product Development System |
| IPS | Impact Protection System |