Each registration number begins with a letter designating type of vehicle.
| Prefix | Type |
|---|---|
| P | Private Vehicle |
| D | Demonstration Vehicle (usually used by Automobile Dealerships) |
| R | Rental Vehicle |
| H | Hired Vehicle, bus, taxi |
| V | Visitors |
| X | Terrestrial vehicles e.g. Paver (vehicle), extra heavy cranes |
| T | Transportation (Goods) Vehicles & Pickup Trucks |
Plates for each type are issued in alphabetical order, with the letters I, Q, and V excluded so as to avoid conflict with 1, O and diplomatic including the military and coast guard initials. The Trinidad Regiment bears a registration mark starting with TTR, the Defence Force bears a registration mark starting with TTDF, the Coast Guard bears a registration mark starting with TTCG and Voluntary Defence Force VDF.
Read more about this topic: Vehicle Registration Plates Of Trinidad And Tobago