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World Wide Navigator
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United StatesInsight & Innovation For over 125 years, Union Switch and Signal (US&S) has been known for leading the development of wayside equipment, vital relays and train systems. Today, US&S is applying its unique knowledge to developing advanced rail control systems. International Reach As a regional company of Ansaldo STS, US&S serves rail and transit customers in the USA, Canada & Central & South America, with a concentrated focus on transit in China, South Korea and Taiwan. US&S is headquartered in Pittsburgh, Pennsylvania and has manufacturing facilities in South Carolina. Support and sales offices are located throughout the USA, Canada, Italy, Brazil, South Korea and China.
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