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The role of the ertms users group in the consolidation of the ERTMS technical specification for
baselines 2 and 3

the previous SRS 3.3.0. In 2016, a second release (SRS 3.6.0) was added to TSI CCS, adding the
possibility to use packet switching technology (GPRS) and on-line key management.

4.2 Present and future developments

At present, the ERTMS Users Group is working in coordination with the European working groups
and authorities in applied research areas included in the global approach of the Shift2Rail
programme:

» Use of satellite navigation provided by Galileo to the incorporation of Level 3
applications (with hybrid Level 3 as a first step) and virtual balises
» Automatic Train Operation, (with and without train driver)

» Alternative for GSM-R
» Improved IT-Security
» Enhancement Braking Curves harmonisation

Facilitating the solutions to difficulties encountered along the deployment of Baseline 2 and
Baseline 3, the EUG pays special attention to crucial aspects like:

» Backwards compatibility, assuring the compatibility of Baseline 3 trains with
Baseline 2 lines
» Migration from conventional class B systems to ERTMS and migration within ERTMS
» Improved performance (RAMS) and
» Lower Life Cycle Costs, making ERTMS more competitive with conventional class
B systems.

International Congress on High-speed Rail: Technologies and Long Term Impacts - Ciudad Real (Spain) - 25th anniversary Madrid-Sevilla corridor 91