Union Switch and Signal
1881 - 2009
Location/OriginSwissvale, PA
BiographyThe company was acquired by Ansaldo STS (from 2015, Hitachi Rail STS) in 1988, operating as a whole-owned company until January 2009, when US&S was renamed "Ansaldo STS USA" to operate as a subsidiary of Ansaldo in the Americas and Asia.
