The levels and operation modes are fundamental concepts of the ETCS system (European Train Control System).
The deployment of ETCS: an important test case for Europe - Global
european commission dg tren - ReTrack
The Hybrid ERTMS/ETCS Level 3 Case Study
ERTMS - ERTMS
ERTMS/ETCS : the european train control system
European Rail Traffic Management System, what you need to know
Schematic system architecture for ETCS Level 3 and Virtual Coupling.
European Train Control System - Wikipedia
ERTMS ETCS Signalling System RevF, PDF, Relay
ERTMS/ETCS equipment architecture.
The first European Train Control System in Hungary
Towards the Single European Railway Area - Infrata
Moving Block Signalling. This POSTbrief introduces the European…, by Parliamentary Office of Science and Technology
Moving Block Signalling. This POSTbrief introduces the European