The passenger information display (PIDS) is currently a block in development. It can be linked with trains to predict the arrival times of the train. See this article for details.
When placed adjacent to platform screen doors or diagonal to automatic platform gates (two blocks above the ground), the display will show the destination as shown on the platform screen doors or automatic platform gates.
Recipe
The passenger information display system can be crafted with a shapeless recipe consisting of a sign, redstone block, and iron ingot.
The recipe for the passenger information system display.
Gallery
A PIDS placed adjacent to platform screen doors, showing the destination of the train.