MPA - Sisson Street Tunnel
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License: Creative Commons Attribution-Share-Alike (CC BY-SA)
BH Photo #471193
Definitely looking North. Note the Hunington streetcar trestle in yhe distance.
The fact that it's there means the camera is at the north end of the Baltimore yard, and the view is looking to the north. The fact that its visible means this must be when the "tunnel" was being constructed.
The city built this tunnel when they decided to fill the area as the eastern approach to the soon to be built 29th Street viaduct.