The principal purpose of train data recording has not changed that much over the last 120 years – speed, acceleration and deceleration are physical regularities, which have not changed. Obviously, recording speed and a few other signals will no longer suffice since trains are more complex than ever. Systems that monitor and record modern signaling data like ETCS and PTC information must now have the capability to instantly monitor, assess and analyze that data real-time as well has safely storing the data for later analytics. Modern railway vehicles are increasingly integrated and complex, and the on-board systems including speed sensors, data/event recorders, video/audio recording, etc. must meet the challenge equally.
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