I'd never seen this loop used and have wondered what it was for. Well, on this occasion at least it seemed to be used for stabling. There were driving lights at both ends (which I wouldn't have thought possible) and no driver at either of them.
Location: Haymarket [Tram]
Original line: Edinburgh Trams
Photographer: David Panton
Contact photographer: David Panton
Date: 19/06/2020
Image number: 73570