| Abbreviation | Definition |
|---|---|
| TKN | Transportation Knowledge Network |
| TKOL | Tseung Kwan O Line |
| TKR | Team Keep Right |
| TKT | Ticket |
| TKW | Total Known Weight |
| TL | Taxilane |
| TL | The Loop |
| TL | Tilling Lewisham |
| TL | Touring Luxury |
| TL | Trailer Load |
| TL | Transmission Lacking |
| TL | Truckload |
| TLA | Transportation Lawyers Association |
| TLAG | Transportation Logistics and GIS |
| TLC | Total Luxury Car |
| TLC | Trailable Liveaboard Cruiser |
| TLC | Tune, Lubricate, and Calibrate |
| TLCI | Taxi and Limousine Cost Index |
| TLCI | Transportation for Livable Communities Initiative |
| TLCI | Transportation for Livable Communities Initiatives |