The Community of European Railway and Infrastructure Companies (CER) brings together 53 railway undertakings and infrastructure companies from the European Union, the accession countries (Bulgaria, Croatia and Romania) as well as from the Western Balkan countries.

ERRAC was set up in 2001 with the goal of creating a single European body to help revitalise the European rail sector and make it more competitive, by fostering increased innovation and guiding research efforts at European level. In 2002, ERRAC unveiled its Strategic Rail Research Agenda (SRRA) to the railway community. This European rail initiative paves the way for new innovative forms of collaboration, and has been one of the pioneers for the “technology platforms”, which may lead to major joint technology initiatives during the European Commission's Seventh Framework Programme (2007-2013).

EURNEX - European Rail Research Network of Excellence

EURNEX - the European Rail Research Network of Excellence - was created in January 2004 and aims to integrate a fragmented research landscape, promote the railways contribution to sustainable development and improve the competitiveness and economic stability of the European rail sector. EURNEX members include 63 universities and research centres from 18 EU Member States and Russia, as well as key railway associations, such as UIC, UITP, and UNIFE.

The European Railway Agency in Valenciennes/Lille, France, has the mission of reinforcing safety and interoperability of railways throughout Europe, and thus adding a strong new momentum towards the shared vision of a truly integrated, competitive European railway area. As part of its common transport policy, the Community has adopted legislation to pave the way for gradual establishment of an integrated European railway area, both legally and technically. This involves the development and implementation of Technical Specifications for Interoperability and a common approach to questions concerning railway safety. The Agency's main task is to manage the preparation of these measures.

Organisation for Cooperation of Railways (OSJD)

OSJD's committee is based in Warsaw, Poland and serves an area including Eastern Europe, Russian Federation and Central Asia, Vietnam and China.

South-East Europe Railways Group (SERG) is an organization for collaboration of the railway companies of Albania, Bulgaria, FYR of Macedonia, Greece, Romania, Turkey, Serbia and Montenegro and Republic of Serbska. Those countries cover territory of 1.417.400 (6% of the total area of Europe), inhabited by more then 126 million people (15.5% of the total population of Europe). The overall railway network in the region amounts to 32,332 km (8.86% out of the total European network). 6 out of the 10 Pan-European transport corridors pass through SERG area.

Union Internationale des Chemins de Fer (International Union of Railways; UIC)

UIC main tasks involve: promoting technical cooperation between its members to improve operating conditions and the quality of services offered to customers, whilst respecting their commercial and managerial autonomy, and not interfering in matters of competition; maintaining and developing the overall coherence of the railway system, notably at pan-European level, and achieving interoperability which is one of the keys for bolstering the rail transport competitiveness. UIC has a number of projects and programmes.

Union Internationale des Transports Publics (International Association of Public Transport; UITP)

UITP is the worldwide network of public transport professionals. UITP represents over 2700 urban, local, regional and national mobility actors from more than 80 countries on all continents. UITP unites the entire supply chain of public transport players, such as: operating companies; local, regional and national authorities; the service and supply industry; research institutes, academics and consultants. 

UITP covers all modes of public transport - metro, bus, light rail, regional and suburban railways, and waterborne transport. It also represents collective transport in a broader sense (for instance car-sharing). In addition, UITP is currently further expanding its presence on the mobility market, including the taxi sector. It also has a section focusing exclusively on Central and Eastern Europe.

Union of European Railway Industries (UNIFE)

UNIFE directly represents nearly 60 leading European companies responsible for the design, manufacture, maintenance and refurbishment of guided land transport systems, subsystems and related equipments. UNIFE, based in Brussels, has 16 National Organisations as associated members representing another 900 railway supply companies. The European rail supply industry generates around 60 Billion Euros in revenue per year and employs 130 000 people. UNIFE members manufacture 70% of the world-wide production of rail equipment - Europe

UrbanRail.Net is a gateway to any information related to metros, subways, or similar urban rail transit systems. The site gives a general overview of each city's metro system and links to other relevant sites.