Federal Signal Corp (Federal Signal) designs, manufactures, and supplies a range of products and integrated solutions for municipal, governmental, industrial, and commercial customers. The company's product portfolio includes vehicles and equipment for maintenance and infrastructure end-markets, such as sewer cleaners, industrial vacuum loaders, vacuum- and hydro-excavation trucks, street sweepers, waterblasting equipment, road-marking and line-removal equipment, dump truck bodies, trailers, metal extraction support equipment, and multi-purpose tractors. It also manufactures public safety equipment, including vehicle lightbars and sirens, industrial signaling equipment, public warning systems, and general alarm/public address systems. Federal Signal also operates an aftermarket platform that sells new, used, and rental equipment, and provides parts, service, and repairs.

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Federal Signal invests in research to support the development of new products and the enhancement of existing products and services. In FY2025, the company’s R&D expenses stood at US$13.4 million, which was 0.6% of the company’s revenue.