What does this mean?
So I saw this digital sign while waiting at Dunbar station. I googled it and it said something like, it's to let the train crew know that the next signal is green and it's safe to proceed. Is this correct? And if so why not just use a normal signal?
So I saw this digital sign while waiting at Dunbar station. I googled it and it said something like, it's to let the train crew know that the next signal is green and it's safe to proceed. Is this correct? And if so why not just use a normal signal?