This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
DART LED Map Display. Some DART trains have these LED route describers Green indicates the route which has already been travelled and orange is the route remaining solid red light means that the train will be stopping at that station while flashing red light indicates the next stop own assumed Spsmiler and Classes LED displays