| Term | Definition / Meaning / Stand for |
| T |
Construction & Engineering Abbreviations |
| TAD |
Technical Advisory Document |
| TA |
Technical Assistance |
| TEC |
Technical Engineering Code |
| T/J |
Temperature Joint |
| TAC |
Temporary Access Road |
| TAP |
Temporary Asphalt Pavement |
| TCC |
Temporary Construction Corridor |
| TDF |
Temporary Drainage Facility |
| TDI |
Temporary Drainage Installation |
| TEP |
Temporary Erosion Protection |
| TFC |
Temporary Fence Construction |
| TFD |
Temporary Fence Design |
| TFP |
Temporary Fence Panel |
| TGC |
Temporary Grade Control |
| TGB |
Temporary Guide Barrier |
| TIF |
Temporary Inspection Facility |
| TLA |
Temporary Lane Adjustment |
| TLP |
Temporary Lane Protection |
| TNC |
Temporary Noise Control |
| TNL |
Temporary Noise Level |
| TNP |
Temporary Noise Protection |
| TPT |
Temporary Pavement Transition |
| T/P |
Temporary Power |
| TPF |
Temporary Protection Fence |
| TPP |
Temporary Protection Plan |
| TRO |
Temporary Road Opening |
| TP |
Test Pit |
| TIE |
Tie-in Engineering |
| TBR |
To Be Reviewed |
| TN |
Ton |
| T/B |
Top and Bottom |
| TDC |
Top of Concrete |
| TOD |
Top of Drainage |
| TEL |
Top of Elevation |
| T/E |
Top of Embankment |
| TG |
Top of Grade |
| T/G |
Top of Grate |
| TND |
Top of Natural Drainage |
| TOP |
Top of Pavement |
| TPL |
Top of Pile |
| T/S |
Top of Slab |
| TOT |
Top of Trench |
| TIC |
Total Installed Cost |
| TPC |
Total Project Cost |
| TPM |
Total Project Management |
| TK |
Track |
| TAR |
Traffic Accident Report |
| TAM |
Traffic Analysis Model |
| TAS |
Traffic Analysis System |
| TC |
Traffic Cone |
| TCD |
Traffic Control Device |
| TCE |
Traffic Control Equipment |
| TCF |
Traffic Control Facility |
| TCM |
Traffic Control Measure |
| TCS |
Traffic Control System |
| T/C |
Traffic Control |
| TED |
Traffic Engineering Design |
| TES |
Traffic Engineering System |
| TFL |
Traffic Flow Line |
| TF |
Traffic Flow |
| TGA |
Traffic Grade Adjustment |
| TGK |
Traffic Guidance Kit |
| TID |
Traffic Impact Design |
| TIL |
Traffic Impact Line |
| TIR |
Traffic Impact Report |
| TLC |
Traffic Lane Closure |
| TLD |
Traffic Lane Design |
| TL |
Traffic Lane |
| TMC |
Traffic Management Center |