United States

 
Insight & 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.
 
 

Interact	Industry Firsts	Inspiring
Interconnect with our extensive organizational resources. Contact Us>>	From the largest, most complex railroads in the world, to smaller operations focused on specific needs, US&S is changing the rail industry…one innovation at a time. Products >>	Our enduring history of innovation has transformed the way the world works. Learn about our History of Innovation.