| | Nördlingen Railway Museum http://privat.schlund.de/BEM/ |
| | Nürnberg Transport Museum http://www.vmn.nuernberg.de/bahn/ |
| | Nagoya Railways http://cjn.meitetsu.co.jp |
| | National Association of Railroad Passengers (NARP) http://www.narprail.org |
| | National Association of S Gaugers (NASG) http://trainweb.org/nasg |
| | National Rail http://www.nationalrail.com.au |
| | National Rail Historical Society (NRHS) http://www.rrhistorical.com/nrhs/ |
| | National Transportation Safety Board http://www.ntsb.gov |
| | Neaples Metro http://www.itb.it/metroNA/ |
| | Neaples Railway Museum http://www.microsys.it/pietrarsa/ |
| | Netherlands Speed Rail (SOUTHERN HIGH SPEED LINE) http://www.hslzuid.nl |
| | NEU Systemes ferroviaires http://www.neu-nsf.com |
| | Neustadt Railway Museum http://www.eisenbahmuseum-neustadt.de |
| | New Delhi Railway Museum http://railmuseum.com |
| | New York City Metro http://www.nycsubway.org |
| | New York Regional Rail http://www.earthcom.net/~nyrr/ |
| | Nordwaggon http://www.nordwaggon.se |
| | Norfolk Southern http://www.nscorp.com |
| | Nort Western Trains http://nwt.rail.co.uk |
| | North West Rail Electric http://www.easystreet.com/nwrail/ |
| | Northwest Airlines http://www.nwa.com |
| | Northwestern University, USA (TRANSPORTATION LIBRARY) http://iti.acns.nwu.edu/library/ |
| | Norwegian National Rail Administration (JERNBANEVERKET) http://www.jernbaneverket.no |
| | Norwegian Railways (NSB BA) http://www.nsb.no |
| | Novatrans http://www.novatrans.fr |
| | NS Cargo http://www.nscargo.nl |
| | NS Technical Research http://www.nsto.nl |
| | NSAI http://www.nsai.ie |
| | NSB Sikkerhetsreglement Signalforskrifter http://www.abcnett.no/arnew/Sir/401_Vb.html |
| | Nuevo Central Argentino (NCA) http://www.nca.com.ar |
