This short video shows the ABS signal sequence in the opposite direction (as compared to the previous video). A train approaches and the signal shows green. When the train enters the block protected by the signal it changes to red. It remains so until the complete train has exited the block at the other end (inside the tunnel), at which point the signal changes to yellow 20 seconds later. It remains yellow for about 20 seconds and then reverts back to green. In the video, which is composed from a number of short clips, everything happens a lot faster, but you get the idea.

And excuse the poor quality. But the idea was to show the signal aspect sequence only ;-)

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