Network Rail
- Authority responsible for the United Kingdom's railway network. Information and news about the network.
- http://www.networkrail.com/

Jernbaneverket
- The norwegian National Rail Administration is responsible for the management og the national reailway network, on behalf of the Ministry of Transport and Communication.
- http://www.jernbaneverket.no/

Banverket
- Responsible for the operation and management of state track installations in Sweden.
- http://www.banverket.se/

Rail Vikas Nigam Ltd
- Indian Railway company, providing high speed Rail connectivity infrastructure among metro cities of Delhi-Mumbai-Chennai and Kolkata.
- http://www.rvnl.org/

AlpTransit Gotthard AG, Luzern (Switzerland)
- Constructing the longest railway tunnel in the world, through the base of the Alps between Switzerland and Italy. Information and history of the current and new Gotthard tunnels.
- http://www.alptransit.ch/

Project PARTNER - Path Allocation Re-engineering of Timetable Network for European Railways
- EU project to develop transparent access to railway infrastructure in Europe. PARTNER is coordinated by the Institute of Transport Research (DLR) in Berlin.
- http://www.rail-partner.org

Australian Rail Track Corporation
- The Australian Rail Track Corporation Ltd currently has responsibility for the management of 4430 route kilometres of standard gauge interstate track, mainly in South Australia, Victoria and Western Australia.
- http://www.artc.com.au/