"Train approaching" board outside Epping Station

[jamesb]

I have often noticed a board sticking out of wall, adjacent to the station entrance, near the bike shelter at Epping Station.

I noticed today that it lights up when a train is approaching the platform at Epping, with white letters (although it looked a bit faded) "train approaching".

What would the purpose of that board be??

[crusty54]

It informs bus drivers that a train is approaching. Hopefully they will not drive off before passengers can get on the bus.