Rail Transport Abbreviations and Acronyms
- NYO&WNew York, Ontario and Western railway
- NYSWNew York Susquehanna and Western
- O&IOperations and Interface
- O&SPAOperational and Support hazard Analysis
- O/BOver Bridge
- OIMXOliver Iron Mining
- OROROutside Rules of the Route
- ORRXOregon Department of Transportation
- P&LEPittsburgh and Lake Erie Railroad
- P.WayPermanent Way
- P3Primavera Project Planner
- PAYEPay-As-You-Earn
- PCSE(M)Profit Centre Signal Engineer (Maintenance)
- PCSE(W)Profit Centre Signal Engineer (Works)
- PCVPetty Cash Voucher
- PCYPittsburgh Chartiers and Youghiogheny
- PESRCYPassEnger Service Requirement Compliance Yardstick
- PIRYPioneer Industrial Railway
- PLAXPort of Los Angeles
- PLBXPalmetto Brick
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