Federal Signal STH-10

Federal Signal Corporation is an American manufacturer headquartered in Downers Grove, Illinois. Federal Signal manufactures street sweeper vehicles, public address systems, emergency vehicle equipment, and emergency vehicle lighting.

The company operates two groups: Federal Signal Environmental Solutions and Federal Signal Safety and Security Systems. Federal Signal Environmental Solutions Group manufactures street sweeper vehicles, sewer cleaner and vacuum loader trucks, hydro excavators, waterblasting equipment, dump truck bodies, and trailers. Federal Signal Safety and Security Systems Group manufactures campus alerting systems, emergency vehicle lighting, alarm systems, outdoor warning sirens, and public address systems.