| Abbreviation | Definition |
|---|---|
| NOR | Notice Of Readiness |
| NORDO | No Radio |
| NOTA | North Oakland Transportation Authority |
| NOTAM | Notice to Airmen |
| NOTD | Notice Of Toll Due |
| NOTIS | NJTPA Online Transportation Information System |
| NOV | Number Of Vehicles |
| NOYS | National Organization for Youth Safety |
| NPA | Nigerian Ports Authority |
| NPIAS | National Plan of Integrated Airport Systems |
| NPP | National Priority Program |
| NPR | Noise Preferential Route |
| NPTS | National Personal Transportation Survey |
| NPTS | Nationwide Personal Transportation Survey |
| NPTS | Nationwide Personal Transportation Surveys |
| NQZ | New Quiet Zone |
| NQZC | New Quiet Zone Crossing |
| NR | Named Route |
| NRC | Net Reduction of Congestion |
| NRC | Nigerian Railway Corporation |