Westinghouse Air Brake Technologies Corporation, doing business as Wabtec Corporation, provides technology-based products and services for the freight rail and passenger transit industries worldwide. It operates in two segments, Freight and Transit. The Freight segment manufactures and services components for new and existing locomotive and freight cars; supplies railway electronics and positive train control equipment; provides signal design and engineering services; builds switcher locomotives; rebuilds freight locomotives; and provides heat exchangers and cooling systems for rail and other industrial markets. This segment serves publicly traded railroads; leasing companies; manufacturers of original equipment, such as locomotives and freight cars; and utilities. The Transit segment manufactures and services components for new and existing passenger transit vehicles, including subway cars and buses; builds commuter locomotives; and refurbishes subway cars. This segment serves public transit authorities and municipalities, leasing companies, and manufacturers of subway cars and buses. The company's products include positive train control equipment and electronically controlled pneumatic braking products; railway electronics, including event recorders, monitoring equipment, and end of train devices; freight car truck components; draft gears, couplers, and slack adjusters; air compressors and dryers; track and switch products; railway braking equipment and related components; friction products, including brake shoes and pads; door and window assemblies, and accessibility lifts and ramps for buses and subway cars; and traction motors. It also builds, remanufactures, and overhauls commuter and switcher locomotives, and transit cars. Westinghouse Air Brake Technologies Corporation was founded in 1869 and is headquartered in Wilmerding, Pennsylvania.