| Abbreviation | Definition |
|---|---|
| PTMD | Parking and Transportation Management District |
| PTMD | Parking Transportation Management District |
| PTMS | Public Transportation Facilities and Equipment Management System |
| PTMS | Public Transportation Management System |
| PTO | Please Take Off |
| PTO | Power Take Off |
| PTP | Pre-Travel Penalty |
| PTP | Professional Transportation Partners |
| PTP | Professional Transportation Planner |
| PTPK | Pennsylvania Turnpike |
| PTPW | Pre-Travel Penalty Waiver |
| PTRA | Port Terminal Railroad Association |
| PTS | Parking and Transportation Services |
| PTS | Parking Transportation Services |
| PTS | Practical Test Standards |
| PTS | Prisoner Transportation Services |
| PTSB | Public Transportation Safety Board |
| PTSC | Public Transportation Service Corporation |
| PTSC | Public Transportation Services Corporation |
| PTSP | Public Transportation Subsidy Program |