About UNISIG

UNISIG was created to develop the ERTMS/ETCS technical specifications.

As part of UNIFE (the European Rail Industry Association) (link), UNISIG is the committee responsible for the development, maintenance and updating of the ERTMS and CCS/TMS[1] technical specifications. For ERTMS in particular, this process is carried out in close cooperation with the European Union Agency for Railways (ERA).

Although the final version of the ERTMS specifications is officially issued by the European Commission after approval by the Member States, it is fundamentally shaped by a recommendation from ERA. This recommendation is discussed extensively with the railway sector, including UNISIG, and requires considerable effort from the committee to define these specifications.

UNISIG is working jointly with railways in the European Rail Joint Undertaking System Pillar on operational and technical standards for the entire railway signalling system, which will have a major business impact on the entire rail industry.

Nine companies are currently members of UNISIG: Alstom, AŽD, CAF, Hitachi, Mermec, Progress Rail, Scheidt&Bachmann, Siemens Mobility and Thales.

Detailed information on UNISIG, its functioning, and  joining conditions may be found in the UNISIG factsheet in the dedicated website section.

[1] CCS: Control command and Signalling
TMS: Traffic Management System