| Abbreviation | Definition |
|---|---|
| THUD | Transportation Housing and Urban Development |
| THW | Through Highway |
| TI | Trivial Intersection |
| TIA | Tampa International Airport |
| TIA | Transportation In America |
| TIA | Transportation Intermediaries Association |
| TIA | Tucson International Airport |
| TIAD | Technology and Innovation in Airline Distribution |
| TIAS | Traffic Irregularity Analysis System |
| TIB | Transportation Improvement Board |
| TIB | Transportation Insurance Brokers |
| TIC | Traffic Information Collecting |
| TIC | Transportation Information Center |
| TIC | Travel Insurance Credit |
| TIC | Traveler Information Center |
| TICT | Traffic Information Collecting Technology |
| TID | Transportation Improvement Districts |
| TIDC | Transportation Infrastructure Durability Center |
| TIDF | Transit Impact Development Fee |
| TIDICC | Transportation Infrastructure Development Investment Consultancy Center |