Posthip Scott sent me this link to a story about an ancient railroad switch control system that is still in use. NBC has a pretty good video summary.
|Metra’s 'tower' at the A2 interlock, built 1907.|
Metra must be the new name for the Chicago Transit Authority
|Switch control system, installed in the tower in 1932.|
|Small, gnarly portion of the railroad switches controlled by the Tower.|