Federal Signal Corporation revenue for the last year amounted to 1.72 B USD, the most of which — 1.44 B USD — came from its highest performing source at the moment, Environmental Solutions, the year earlier bringing 1.19 B USD. The greatest contribution to the revenue figure was made by United States — last year it brought Federal Signal Corporation 1.34 B USD, and the year before that — 1.15 B USD.