This automatic derailer is deployed when ever a trainset is inside the Acela maintenance shed at the Southhampton (Boston) facility. The derail is controlled by a complex lock-out tag-out control board, which provides electrical and personnnel safety through a series of lockable switches and personnel keys.

Photographed by David B. Perry, November 22, 2003.
Added to the photo archive by David Perry, November 22, 2003.
Railroad: Amtrak.

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