G'day Ulf and others,
I have been viewing some Swedish cab ride video clips and have noticed level crossing distant signals.
When on double track, the normal running direction distant signal displaying three steady yellows.
However, for the bi-directional running track, the distant displays three flashing yellows.
Obviously, both sides of the level crossing must be secured for the train to proceed.
And, the level crossing signal for the normal running direction does display white for proceed.
I can only presume that the bi-directional running distant signals flash due to bi-directional working not being utilized.
In the same manner that bi-directional running main signals display stop when bi-directional working is not utilized.
I have also witnessed a train emergency stop occurring at a normal free-standing distant signal.
Due to the camera position in the cab, it is not possible to detect the distant signal indication.
Though, it does appear to be blank.
At position roughly 26.54 in the video clip linked below.
No warning alarm is heard prior to the emergency brake application which occurs at the distant signal.
The air is restored and the train then continues.
The main signal is then passed at speed with no further penalty problem.
Again, due to the camera location, it is not possible to detect the display in the main signal.
I am curious as to whether this would be a driver initiated emergency or initiated by the ATC system, and why.
I am presuming that the ATC system would provide an alarm if train speed is too fast for a restricted signal or track speed.
And, then initiate a train brake application if the driver does not respond correctly.