| Abbreviation | Definition |
|---|---|
| PRC | Porsche Replica Club |
| PRD | Power Reverse Dual |
| PRDA | Provincial Road Development Authority |
| PRIDE | Parents Reducing Incidents of Driver Error |
| PRM | Passenger with Restricted Mobility |
| PRM | Precision Runway Monitor |
| PROMETHEUS | Program for European Traffic with Highest Efficiency and Unprecedented Safety |
| PROWAP | Public Right-Of-Way Assessment Process |
| PROWAP | Public Right-Of-Way Assessment Process |
| PRPW | Pennyrile ParkWay |
| PRS | Ports Refurbishment System |
| PRT | Personal Rapid Transit |
| PRTC | Potomac and Rappahannock Transportation Commission |
| PRTV | Peterlee Relational Test Vehicle |
| PRV | Priority Response Vehicle |
| PRV | Protected Reconnaissance Vehicles |
| PSA | Pacific Southwest Airlines |
| PSD | Port of San Diego |
| PSGP | Port Security Grant Program |
| PSI | Post Shipment Inspection |