destination board

noun2

1. •
   A board attached to the side of a railway carriage which indicates where the train is going to. More modern variants can be a dot-matrix display panel.

   • At Kingsbridge, the bilingualism of the Irish Republic was evident in the tickets, the station notices, and the neat destination boards on the 10.40 a.m. express to Cork. — 1955
2. •
   A departure board or indicator at a railway station.