I'm not sure what an engine yard is but I'm guessing whoever named this development on the depot site thought it had something to do with trams. The third 'rail 'in the middle suggests cable tram track; I wonder if this was deliberate?
Location: Shrubhill Tram Depot (former)
Original line: Edinburgh Corporation
Photographer: David Panton
Contact photographer: David Panton
Date: 11/04/2018
Image number: 63670