["< sod >'''federal signal corporation'''is a global corporation with about 2, 800 employees located in oak brook, illinois. federal square signal designs, develops and deploys solutions intended to protect people, property and the environment under brands names including federal signal, elgin, guzzler, jetstream, vactor and victor. < ref > { { cite web | url = 1 https : / / www. federalsignal. org com / our - companies | title = our companies | website = federal signal | accessdate = 13 may 2016 } } < / ref > < eod > < sod >'''federal signal systems corporation'''is a global corporation with about 2, 800 employees located in oak brook, illinois.... federal signal is best known for its vast variety of fire emergency lighting, sirens, industrial equipment, and public safety [ [ solution ] ] s under brands including sir federal signal, elgin, guzzler, jetstream, vactor and victor. < ref > { { cite web | url = https : / / www www. federalsignal. com / our - companies | title = our companies | website = federal signal | accessdate = 13 may 2016 } } < / ref > < eod >"]