Union Switch & Signal
Union Switch & Signal (commonly referred to as US&S) was an American company based in Pittsburgh, Pennsylvania, which focused on railway signaling equipment, systems and services. The company was acquired by Ansaldo STS (from 2015, Hitachi Rail STS) in 1988, operating as a wholly-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.
US&S head office located in Swissvale, Pennsylvania, as seen in 1929 | |
| Company type | Subsidiary (1917–) |
|---|---|
| Industry | Electronics |
| Founded | 1881 |
| Founder | George Westinghouse |
| Defunct | January 2009 |
| Fate | First acquired by WABCo in 1917, then other owners. In January 2009, it became "Ansaldo STS USA". |
| Successor | Ansaldo STS USA |
| Headquarters | , |
Area served | Worldwide |
| Products | Railway signaling equipment, communication systems and services, level crossing signals |
Number of employees | 900 (2005) |
| Parent | Ansaldo STS (1988) |
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