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Exhibit 21

FEDERAL SIGNAL CORPORATION AND SUBSIDIARIES

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SUBSIDIARIES OF THE REGISTRANT AS OF DECEMBER 31, 2023

NAME OF SUBSIDIARY						JURISDICTION OF INCORPORATION
Crysteel Manufacturing, Inc.						Minnesota
Deist Industries, LLC						Delaware
Elgin Sweeper Company						Delaware
Federal Signal of Europe B.V.						Netherlands
Federal Signal UK Holdings Limited						United Kingdom
Federal Signal VAMA, S.A.						Spain
FS Depot, LLC						Wisconsin
FST Canada Inc.						Canada
GenNx/TBEI Intermediate Co.						Delaware
Ground Force Manufacturing LLC						Delaware
Guzzler Manufacturing, Inc.						Alabama
HighMark Traffic Services, Inc.						Montana
Jetstream of Houston, Inc.						Delaware
Jetstream of Houston LLP						Texas
Joe Johnson Equipment LLC						Delaware
Mark Rite Lines Equipment Company, Inc.						Delaware
Northend Truck Equipment, LLC						Washington
OSW Equipment & Repair, LLC						Washington
Ox Bodies, Inc.						Alabama
Rugby Manufacturing Company						Oregon
Tishomingo Acquisition, LLC						Delaware
Travis Acquisition LLC						Delaware
Travis Body and Trailer, Inc.						Texas
Travis Leasing, LLC						Delaware
Truck Bodies & Equipment International, Inc.						Delaware
Vactor Manufacturing, LLC						Illinois
Victor Industrial Equipment (PTY) Limited						South Africa
Victor Products Holdings Ltd.						United Kingdom
Victor Products Ltd.						United Kingdom
Western Truck Body Mfg. ULC						Canada
Work Equipment Ltd.						Canada

Subsidiaries, including inactive subsidiaries, are not shown by name in the above listing, if considered in the aggregate as a single subsidiary, would not constitute a significant subsidiary.