| Abbreviation | Definition |
|---|---|
| NHTSA | National Highway Transportation Safety Administration |
| NHVR | National Heavy Vehicle Regulator |
| NHVWC | North Houston Volkswagen Club |
| NIAM | Newbury Insitute of Advanced Motorits |
| NICS | NAS (National Airspace System) Interfacility Communications System |
| NICTD | Northern Indiana Commuter Transportation District |
| NIMBY | Not In My Back Yard |
| NIMS | National Information Management System |
| NINETAXI | Nine Taxi's |
| NIP | National Inspection Plan |
| NIP | Network Improvement Program |
| NIPA | National Income and Product Accounts |
| NIS | Not In Service |
| NISSAN | Nihon Sangyo (which basically means Japan Industry. ) |
| NITC | National Institute for Transportation and Communities |
| NJDOT | New Jersey Department of Transportation |
| NJT | New Jersey Turnpike |
| NL | Navigation List |
| NLB | New Lantao Bus |
| NLB | New Lantau Bus |