| Abbreviation | Definition |
|---|---|
| TDP | Tour Driven Performance |
| TDP | Transit Development Program |
| TDRF | Transportation Development Review Fee |
| TDRP | Transportation Diversity Recruitment Program |
| TDS | Tone and Digit Sender |
| TDS | Transportation Data Sampler |
| TDS | Transportation Data Source |
| TDU | Trucking Down Under |
| TDWR | Terminal Doppler Weather Radar |
| TDX | TransDominion Express passenger train |
| TDZ | Touch Down Zone |
| TDZE | TouchDown Zone Elevation |
| TE | Tank Economy |
| TE | Traffic Engineering |
| TE | Tunnel Endpoint |
| TEA | Transportation Empowerment Act (introduced unsuccessfully in 1996, 1997 and again on 2013-11-14) |
| TEA | Transportation Enhancement Act |
| TEA | Transportation Equity Act |
| TEA-21 | Transportation Equity Act for the 21st Century |
| TEAG | Transportation Equity Advisory Group |