Oak Brook, Illinois, April 20, 2021 - Federal Signal Corporation (NYSE: FSS) (the “Company”), a leader in environmental and safety solutions, will announce first quarter earnings before the market opens on Tuesday, May 4, 2021.  The Company will also host an investor conference call and webcast at 10 a.m. Eastern Time the same day with Jennifer L. Sherman, president and chief executive officer, and Ian A. Hudson, senior vice president and chief financial officer.