<?xml version="1.0" encoding="UTF-8"?>

<!--XBRL Document Created with the Workiva Platform-->
<!--Copyright 2023 Workiva-->
<!--r:e27f3491-ea43-4f12-8b90-628eeda3e006,g:5e6daf87-9b66-4626-9374-56b81ba516a3-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:fss="http://www.federalsignal.com/20230630" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:dtr-types1="http://www.xbrl.org/dtr/type/2020-01-21" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" xmlns:dtr-types="http://www.xbrl.org/dtr/type/2022-03-31" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.federalsignal.com/20230630">
  <xs:import namespace="http://fasb.org/srt/2023" schemaLocation="https://xbrl.fasb.org/srt/2023/elts/srt-2023.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2023" schemaLocation="https://xbrl.fasb.org/us-gaap/2023/elts/us-gaap-2023.xsd"/>
  <xs:import namespace="http://www.w3.org/1999/xlink" schemaLocation="http://www.xbrl.org/2003/xlink-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/instance" schemaLocation="http://www.xbrl.org/2003/xbrl-instance-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/2003/linkbase" schemaLocation="http://www.xbrl.org/2003/xbrl-linkbase-2003-12-31.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2020-01-21" schemaLocation="https://www.xbrl.org/dtr/type/2020-01-21/types.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/2022-03-31" schemaLocation="https://www.xbrl.org/dtr/type/2022-03-31/types.xsd"/>
  <xs:import namespace="http://xbrl.org/2005/xbrldt" schemaLocation="http://www.xbrl.org/2005/xbrldt-2005.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/country/2023" schemaLocation="https://xbrl.sec.gov/country/2023/country-2023.xsd"/>
  <xs:import namespace="http://xbrl.sec.gov/dei/2023" schemaLocation="https://xbrl.sec.gov/dei/2023/dei-2023.xsd"/>
  <xs:annotation>
    <xs:appinfo>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="fss-20230630_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="fss-20230630_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="fss-20230630_cal.xml" xlink:role="http://www.xbrl.org/2003/role/calculationLinkbaseRef" xlink:type="simple"/>
      <link:linkbaseRef xmlns:xlink="http://www.w3.org/1999/xlink" xlink:arcrole="http://www.w3.org/1999/xlink/properties/linkbase" xlink:href="fss-20230630_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="DocumentandEntityInformation" roleURI="http://www.federalsignal.com/role/DocumentandEntityInformation">
        <link:definition>0000001 - Document - Document and Entity Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsUnaudited" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofOperationsUnaudited">
        <link:definition>0000002 - Statement - Condensed Consolidated Statements of Operations (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofOperationsUnauditedParenthetical" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofOperationsUnauditedParenthetical">
        <link:definition>0000003 - Statement - Condensed Consolidated Statements of Operations (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnaudited">
        <link:definition>0000004 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofComprehensiveIncomeUnauditedParenthetical" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofComprehensiveIncomeUnauditedParenthetical">
        <link:definition>0000005 - Statement - Condensed Consolidated Statements of Comprehensive Income (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheets" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedBalanceSheets">
        <link:definition>0000006 - Statement - Condensed Consolidated Balance Sheets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedBalanceSheetsParenthetical" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedBalanceSheetsParenthetical">
        <link:definition>0000007 - Statement - Condensed Consolidated Balance Sheets (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofCashFlowsUnaudited" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofCashFlowsUnaudited">
        <link:definition>0000008 - Statement - Condensed Consolidated Statements of Cash Flows (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofStockholdersEquityUnaudited" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnaudited">
        <link:definition>0000009 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CondensedConsolidatedStatementsofStockholdersEquityUnauditedParenthetical" roleURI="http://www.federalsignal.com/role/CondensedConsolidatedStatementsofStockholdersEquityUnauditedParenthetical">
        <link:definition>0000010 - Statement - Condensed Consolidated Statements of Stockholders' Equity (Unaudited) (Parenthetical)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPolicies" roleURI="http://www.federalsignal.com/role/SummaryofSignificantAccountingPolicies">
        <link:definition>0000011 - Disclosure - Summary of Significant Accounting Policies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Acquisitions" roleURI="http://www.federalsignal.com/role/Acquisitions">
        <link:definition>0000012 - Disclosure - Acquisitions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognition" roleURI="http://www.federalsignal.com/role/RevenueRecognition">
        <link:definition>0000013 - Disclosure - Revenue Recognition</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Inventories" roleURI="http://www.federalsignal.com/role/Inventories">
        <link:definition>0000014 - Disclosure - Inventories</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Debt" roleURI="http://www.federalsignal.com/role/Debt">
        <link:definition>0000015 - Disclosure - Debt</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangiblesAssets" roleURI="http://www.federalsignal.com/role/GoodwillandOtherIntangiblesAssets">
        <link:definition>0000016 - Disclosure - Goodwill and Other Intangibles Assets</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxes" roleURI="http://www.federalsignal.com/role/IncomeTaxes">
        <link:definition>0000017 - Disclosure - Income Taxes</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="Pensions" roleURI="http://www.federalsignal.com/role/Pensions">
        <link:definition>0000018 - Disclosure - Pensions</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingencies" roleURI="http://www.federalsignal.com/role/CommitmentsandContingencies">
        <link:definition>0000019 - Disclosure - Commitments and Contingencies</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShare" roleURI="http://www.federalsignal.com/role/EarningsPerShare">
        <link:definition>0000020 - Disclosure - Earnings Per Share</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquity" roleURI="http://www.federalsignal.com/role/StockholdersEquity">
        <link:definition>0000021 - Disclosure - Stockholders' Equity</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformation" roleURI="http://www.federalsignal.com/role/SegmentInformation">
        <link:definition>0000022 - Disclosure - Segment Information</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurements" roleURI="http://www.federalsignal.com/role/FairValueMeasurements">
        <link:definition>0000023 - Disclosure - Fair Value Measurements</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperations" roleURI="http://www.federalsignal.com/role/DiscontinuedOperations">
        <link:definition>0000024 - Disclosure - Discontinued Operations</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEvents" roleURI="http://www.federalsignal.com/role/SubsequentEvents">
        <link:definition>0000025 - Disclosure - Subsequent Events</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesPolicies" roleURI="http://www.federalsignal.com/role/SummaryofSignificantAccountingPoliciesPolicies">
        <link:definition>9954701 - Disclosure - Summary of Significant Accounting Policies (Policies)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTables" roleURI="http://www.federalsignal.com/role/AcquisitionsTables">
        <link:definition>9954702 - Disclosure - Acquisitions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionTables" roleURI="http://www.federalsignal.com/role/RevenueRecognitionTables">
        <link:definition>9954703 - Disclosure - Revenue Recognition (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesTables" roleURI="http://www.federalsignal.com/role/InventoriesTables">
        <link:definition>9954704 - Disclosure - Inventories (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtTables" roleURI="http://www.federalsignal.com/role/DebtTables">
        <link:definition>9954705 - Disclosure - Debt (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsTables" roleURI="http://www.federalsignal.com/role/GoodwillandOtherIntangibleAssetsTables">
        <link:definition>9954706 - Disclosure - Goodwill and Other Intangible Assets (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionsTables" roleURI="http://www.federalsignal.com/role/PensionsTables">
        <link:definition>9954707 - Disclosure - Pensions (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesTables" roleURI="http://www.federalsignal.com/role/CommitmentsandContingenciesTables">
        <link:definition>9954708 - Disclosure - Commitments and Contingencies (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareTables" roleURI="http://www.federalsignal.com/role/EarningsPerShareTables">
        <link:definition>9954709 - Disclosure - Earnings Per Share (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityTables" roleURI="http://www.federalsignal.com/role/StockholdersEquityTables">
        <link:definition>9954710 - Disclosure - Stockholders' Equity (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationTables" roleURI="http://www.federalsignal.com/role/SegmentInformationTables">
        <link:definition>9954711 - Disclosure - Segment Information (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsTables" roleURI="http://www.federalsignal.com/role/FairValueMeasurementsTables">
        <link:definition>9954712 - Disclosure - Fair Value Measurements (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperationsTables" roleURI="http://www.federalsignal.com/role/DiscontinuedOperationsTables">
        <link:definition>9954713 - Disclosure - Discontinued Operations (Tables)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SummaryofSignificantAccountingPoliciesDetails" roleURI="http://www.federalsignal.com/role/SummaryofSignificantAccountingPoliciesDetails">
        <link:definition>9954714 - Disclosure - Summary of Significant Accounting Policies (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsNarrativeDetails" roleURI="http://www.federalsignal.com/role/AcquisitionsNarrativeDetails">
        <link:definition>9954715 - Disclosure - Acquisitions - Narrative (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTracklessAcquisitionDetails" roleURI="http://www.federalsignal.com/role/AcquisitionsTracklessAcquisitionDetails">
        <link:definition>9954716 - Disclosure - Acquisitions - Trackless Acquisition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsBlastersAcquisitionDetails" roleURI="http://www.federalsignal.com/role/AcquisitionsBlastersAcquisitionDetails">
        <link:definition>9954717 - Disclosure - Acquisitions - Blasters Acquisition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="AcquisitionsTowHaulAcquisitionDetails" roleURI="http://www.federalsignal.com/role/AcquisitionsTowHaulAcquisitionDetails">
        <link:definition>9954718 - Disclosure - Acquisitions - Tow Haul Acquisition (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionDisaggregationofRevenueFromContractsWithCustomersDetails" roleURI="http://www.federalsignal.com/role/RevenueRecognitionDisaggregationofRevenueFromContractsWithCustomersDetails">
        <link:definition>9954719 - Disclosure - Revenue Recognition - Disaggregation of Revenue From Contracts With Customers (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionContractLiabilitiesDetails" roleURI="http://www.federalsignal.com/role/RevenueRecognitionContractLiabilitiesDetails">
        <link:definition>9954720 - Disclosure - Revenue Recognition - Contract Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="RevenueRecognitionAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/RevenueRecognitionAdditionalInformationDetails">
        <link:definition>9954721 - Disclosure - Revenue Recognition - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="InventoriesComponentsofInventoriesDetails" roleURI="http://www.federalsignal.com/role/InventoriesComponentsofInventoriesDetails">
        <link:definition>9954722 - Disclosure - Inventories - Components of Inventories (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSummaryofComponentsofLongTermBorrowingsandFinanceLeaseObligationsDetails" roleURI="http://www.federalsignal.com/role/DebtSummaryofComponentsofLongTermBorrowingsandFinanceLeaseObligationsDetails">
        <link:definition>9954723 - Disclosure - Debt - Summary of Components of Long-Term Borrowings and Finance Lease Obligations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtSummaryofCarryingAmountsandEstimatedFairValuesofLongTermBorrowingsDetails" roleURI="http://www.federalsignal.com/role/DebtSummaryofCarryingAmountsandEstimatedFairValuesofLongTermBorrowingsDetails">
        <link:definition>9954724 - Disclosure - Debt - Summary of Carrying Amounts and Estimated Fair Values of Long-Term Borrowings (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtScheduleofGrossBorrowingsandGrossPaymentsDetails" roleURI="http://www.federalsignal.com/role/DebtScheduleofGrossBorrowingsandGrossPaymentsDetails">
        <link:definition>9954725 - Disclosure - Debt - Schedule of Gross Borrowings and Gross Payments (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DebtAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/DebtAdditionalInformationDetails">
        <link:definition>9954726 - Disclosure - Debt - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsChangesinCarryingAmountofGoodwillDetails" roleURI="http://www.federalsignal.com/role/GoodwillandOtherIntangibleAssetsChangesinCarryingAmountofGoodwillDetails">
        <link:definition>9954727 - Disclosure - Goodwill and Other Intangible Assets - Changes in Carrying Amount of Goodwill (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsGrossCarryingAmountandAccumulatedAmortizationDetails" roleURI="http://www.federalsignal.com/role/GoodwillandOtherIntangibleAssetsGrossCarryingAmountandAccumulatedAmortizationDetails">
        <link:definition>9954728 - Disclosure - Goodwill and Other Intangible Assets - Gross Carrying Amount and Accumulated Amortization (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="GoodwillandOtherIntangibleAssetsAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/GoodwillandOtherIntangibleAssetsAdditionalInformationDetails">
        <link:definition>9954729 - Disclosure - Goodwill and Other Intangible Assets - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="IncomeTaxesAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/IncomeTaxesAdditionalInformationDetails">
        <link:definition>9954730 - Disclosure - Income Taxes - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="PensionsSummaryofComponentsofNetPeriodicPensionExpenseBenefitDetails" roleURI="http://www.federalsignal.com/role/PensionsSummaryofComponentsofNetPeriodicPensionExpenseBenefitDetails">
        <link:definition>9954731 - Disclosure - Pensions - Summary of Components of Net Periodic Pension Expense (Benefit) (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesSummaryofChangesinWarrantyLiabilitiesDetails" roleURI="http://www.federalsignal.com/role/CommitmentsandContingenciesSummaryofChangesinWarrantyLiabilitiesDetails">
        <link:definition>9954732 - Disclosure - Commitments and Contingencies - Summary of Changes in Warranty Liabilities (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesLiabilitiesofDiscontinuedOperationsDetails" roleURI="http://www.federalsignal.com/role/CommitmentsandContingenciesLiabilitiesofDiscontinuedOperationsDetails">
        <link:definition>9954733 - Disclosure - Commitments and Contingencies - Liabilities of Discontinued Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="CommitmentsandContingenciesAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/CommitmentsandContingenciesAdditionalInformationDetails">
        <link:definition>9954734 - Disclosure - Commitments and Contingencies - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareReconciliationofNetIncometoBasicandDilutedEPSDetails" roleURI="http://www.federalsignal.com/role/EarningsPerShareReconciliationofNetIncometoBasicandDilutedEPSDetails">
        <link:definition>9954735 - Disclosure - Earnings Per Share - Reconciliation of Net Income to Basic and Diluted EPS (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/EarningsPerShareAdditionalInformationDetails">
        <link:definition>9954736 - Disclosure - Earnings Per Share - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="EarningsPerShareDetails" roleURI="http://www.federalsignal.com/role/EarningsPerShareDetails">
        <link:definition>9954737 - Disclosure - Earnings Per Share (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityChangesinEachComponentofAccumulatedOtherComprehensiveLossDetails" roleURI="http://www.federalsignal.com/role/StockholdersEquityChangesinEachComponentofAccumulatedOtherComprehensiveLossDetails">
        <link:definition>9954738 - Disclosure - Stockholders' Equity - Changes in Each Component of Accumulated Other Comprehensive Loss (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityReclassificationsfromAccumulatedOtherComprehensiveLossDetails" roleURI="http://www.federalsignal.com/role/StockholdersEquityReclassificationsfromAccumulatedOtherComprehensiveLossDetails">
        <link:definition>9954739 - Disclosure - Stockholders' Equity - Reclassifications from Accumulated Other Comprehensive Loss (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="StockholdersEquityAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/StockholdersEquityAdditionalInformationDetails">
        <link:definition>9954740 - Disclosure - Stockholders' Equity - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationSummaryofNetSalesOperatingIncomeLossandTotalAssetsbySegmentDetails" roleURI="http://www.federalsignal.com/role/SegmentInformationSummaryofNetSalesOperatingIncomeLossandTotalAssetsbySegmentDetails">
        <link:definition>9954741 - Disclosure - Segment Information - Summary of Net Sales, Operating Income (Loss), and Total Assets by Segment (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SegmentInformationAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/SegmentInformationAdditionalInformationDetails">
        <link:definition>9954742 - Disclosure - Segment Information - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsAssetandLiabilitiesMeasuredatFairValueDetails" roleURI="http://www.federalsignal.com/role/FairValueMeasurementsAssetandLiabilitiesMeasuredatFairValueDetails">
        <link:definition>9954743 - Disclosure - Fair Value Measurements - Asset and Liabilities Measured at Fair Value (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsRollForwardofFairValueofRecurringLevel3FairValueMeasurementsDetails" roleURI="http://www.federalsignal.com/role/FairValueMeasurementsRollForwardofFairValueofRecurringLevel3FairValueMeasurementsDetails">
        <link:definition>9954744 - Disclosure - Fair Value Measurements - Roll-Forward of Fair Value of Recurring Level 3 Fair Value Measurements (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="FairValueMeasurementsAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/FairValueMeasurementsAdditionalInformationDetails">
        <link:definition>9954745 - Disclosure - Fair Value Measurements - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperationsAssetsandLiabilitiesofDiscontinuedOperationsDetails" roleURI="http://www.federalsignal.com/role/DiscontinuedOperationsAssetsandLiabilitiesofDiscontinuedOperationsDetails">
        <link:definition>9954746 - Disclosure - Discontinued Operations - Assets and Liabilities of Discontinued Operations (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="DiscontinuedOperationsAdditionalInformationDetails" roleURI="http://www.federalsignal.com/role/DiscontinuedOperationsAdditionalInformationDetails">
        <link:definition>9954747 - Disclosure - Discontinued Operations - Additional Information (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
      <link:roleType id="SubsequentEventsDetails" roleURI="http://www.federalsignal.com/role/SubsequentEventsDetails">
        <link:definition>9954748 - Disclosure - Subsequent Events (Details)</link:definition>
        <link:usedOn>link:presentationLink</link:usedOn>
        <link:usedOn>link:calculationLink</link:usedOn>
        <link:usedOn>link:definitionLink</link:usedOn>
      </link:roleType>
    </xs:appinfo>
  </xs:annotation>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherIntangibleAssets" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOtherIntangibleAssets" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_PlaintiffsDomain" abstract="true" name="PlaintiffsDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_ResponsiveSettlementCandidatesDomain" abstract="true" name="ResponsiveSettlementCandidatesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_DismissedMember" abstract="true" name="DismissedMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_CourtOfCommonPleasPhiladelphiaCountyMember" abstract="true" name="CourtOfCommonPleasPhiladelphiaCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_SupremeCourtofStateofNewYorkErieCountyMember" abstract="true" name="SupremeCourtofStateofNewYorkErieCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SettlementAgreementVoidMember" abstract="true" name="SettlementAgreementVoidMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_NewYorkCityFirefighterPlaintiffsMember" abstract="true" name="NewYorkCityFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PlaintiffsAxis" abstract="true" name="PlaintiffsAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="fss_MRLMember" abstract="true" name="MRLMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TaxBenefitFromInterestOfStockDeduction" abstract="false" name="TaxBenefitFromInterestOfStockDeduction" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_NumberOfFirefightersConsideredAsPartOfTheSettlement" abstract="false" name="NumberOfFirefightersConsideredAsPartOfTheSettlement" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fss_CorporateAndEliminationsMember" abstract="true" name="CorporateAndEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_A2022CreditAgreementMember" abstract="true" name="A2022CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_InterestRateSwap2022Member" abstract="true" name="InterestRateSwap2022Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="fss_EuropeOtherMember" abstract="true" name="EuropeOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PittsburghFirefighterPlaintiffsMember" abstract="true" name="PittsburghFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_Warrantyperiod" abstract="false" name="Warrantyperiod" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="fss_ChicagoFirefighterPlaintiffsMember" abstract="true" name="ChicagoFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_OutsidePennsylvaniaFirefighterPlaintiffsMember" abstract="true" name="OutsidePennsylvaniaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LineofCreditFacilityCovenantsPermittedDividendsandStockRepurchases" abstract="false" name="LineofCreditFacilityCovenantsPermittedDividendsandStockRepurchases" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_OtherPaymentstoAcquireBusinessesFinancingActivity" abstract="false" name="OtherPaymentstoAcquireBusinessesFinancingActivity" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LineofCreditFacilityCovenantsPermittedOtherIncrementalCashPayments" abstract="false" name="LineofCreditFacilityCovenantsPermittedOtherIncrementalCashPayments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_RemainingMember" abstract="true" name="RemainingMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_WarningsystemsMember" abstract="true" name="WarningsystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_IndustrialsignalingequipmentMember" abstract="true" name="IndustrialsignalingequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_CourtSettlementDomain" abstract="true" name="CourtSettlementDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerDeposits" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerDeposits" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_PennsylvaniaFirefighterPlaintiffsMember" abstract="true" name="PennsylvaniaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_MassachusettsFirefighterPlaintiffsMember" abstract="true" name="MassachusettsFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LesseeOperatingLeaseInitialLeaseTerm" abstract="false" name="LesseeOperatingLeaseInitialLeaseTerm" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:durationItemType"/>
  <xs:element id="fss_AlleghenyCountyPennsylvaniaMember" abstract="true" name="AlleghenyCountyPennsylvaniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SupremeCourtofStateofNewYorkNewYorkCountyMember" abstract="true" name="SupremeCourtofStateofNewYorkNewYorkCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PublicsafetyandsecurityequipmentMember" abstract="true" name="PublicsafetyandsecurityequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_InterestRateSwap2023Member" abstract="true" name="InterestRateSwap2023Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types:domainItemType"/>
  <xs:element id="fss_OtherMember" abstract="true" name="OtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SettlementCandidatesDomain" abstract="true" name="SettlementCandidatesDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LatvianCommercialDisputeMember" abstract="true" name="LatvianCommercialDisputeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SuperiorCourtofNewJerseyUnionCountyMember" abstract="true" name="SuperiorCourtofNewJerseyUnionCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_AmortizationOfInterestRateSwapSettlementGain" abstract="false" name="AmortizationOfInterestRateSwapSettlementGain" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_November2014RepurchaseProgramMember" abstract="true" name="November2014RepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SafetyAndSecuritySystemsMember" abstract="true" name="SafetyAndSecuritySystemsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TaxBenefitFromRemeasurementOfDeferredTaxesForChangesinStateTaxApportionment" abstract="false" name="TaxBenefitFromRemeasurementOfDeferredTaxesForChangesinStateTaxApportionment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_FireRescueMember" abstract="true" name="FireRescueMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_StockIssuedDuringPeriodValuePerformanceShareUnitsNetOfSharesPaidForTaxes" abstract="false" name="StockIssuedDuringPeriodValuePerformanceShareUnitsNetOfSharesPaidForTaxes" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_RentalincomeMember" abstract="true" name="RentalincomeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_StockIssuedDuringPeriodValueStockOptionExercisesAndOther" abstract="false" name="StockIssuedDuringPeriodValueStockOptionExercisesAndOther" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_DepreciableRentalEquipmentAvailableforOperatingLeasesNet" abstract="false" name="DepreciableRentalEquipmentAvailableforOperatingLeasesNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_March2020RepurchaseProgramMember" abstract="true" name="March2020RepurchaseProgramMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PartsMember" abstract="true" name="PartsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_InterestRateSwapFairValueDisclosure" abstract="false" name="InterestRateSwapFairValueDisclosure" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_NorthAmericanRefuseTruckBodyBusinessMember" abstract="true" name="NorthAmericanRefuseTruckBodyBusinessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock" abstract="false" name="GuaranteeObligationsMaximumExposurePercentageofOutstandingVotingCapitalStock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="fss_PercentageOfClaimantsAgreedForSettlement" abstract="false" name="PercentageOfClaimantsAgreedForSettlement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="fss_OtherDisposalGroupsMember" abstract="true" name="OtherDisposalGroupsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessAcquisitionPostClosingAdjustment" abstract="false" name="BusinessAcquisitionPostClosingAdjustment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_PhiladelphiaFirefighterPlaintiffsMember" abstract="true" name="PhiladelphiaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_DepreciableRentalEquipmentAvailableforOperatingLeasesAccumulatedDepreciation" abstract="false" name="DepreciableRentalEquipmentAvailableforOperatingLeasesAccumulatedDepreciation" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_EnvironmentalSolutionsMember" abstract="true" name="EnvironmentalSolutionsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LineOfCreditFacilityCovenantTermsLeverageRatioMaximum" abstract="false" name="LineOfCreditFacilityCovenantTermsLeverageRatioMaximum" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="fss_TracklessMember" abstract="true" name="TracklessMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement" abstract="false" name="PercentageOfClaimantsAgreedForSettlementAsPerSettlementAgreement" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="dtr-types1:percentItemType"/>
  <xs:element id="fss_Acquisitionandintegrationrelatedexpenses" abstract="false" name="Acquisitionandintegrationrelatedexpenses" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_CommitmentsDisclosureTable" abstract="true" name="CommitmentsDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="fss_DeistMember" abstract="true" name="DeistMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_Amended2016CreditAgreementMember" abstract="true" name="Amended2016CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_NonUsLinesOfCreditMember" abstract="true" name="NonUsLinesOfCreditMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerRelationships" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedCustomerRelationships" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_Proceedsfromearlyterminationofinterestrateswap" abstract="false" name="Proceedsfromearlyterminationofinterestrateswap" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LineofCreditFacilityCovenantsHolidayPermittedAcquisitionConsideration" abstract="false" name="LineofCreditFacilityCovenantsHolidayPermittedAcquisitionConsideration" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_FederalCourtEasternDistrictofPennsylvaniaMember" abstract="true" name="FederalCourtEasternDistrictofPennsylvaniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SettlementAgreementMember" abstract="true" name="SettlementAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTradeNames" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedTradeNames" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_OrganizationAndDescriptionOfTheBusinessPolicyTextBlock" abstract="false" name="OrganizationAndDescriptionOfTheBusinessPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:textBlockItemType"/>
  <xs:element id="fss_LossContingencyClaimsSettledAmount" abstract="false" name="LossContingencyClaimsSettledAmount" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_ErieCountyFirefighterPlaintiffsMember" abstract="true" name="ErieCountyFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit" abstract="false" name="SettlementOfferPerEligiblePlaintiffWhoHasAlreadyFiledALawsuit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_UnrecognizedTaxBenefitDecreaseResultingFromDiscontinuedOperationsandDisposal" abstract="false" name="UnrecognizedTaxBenefitDecreaseResultingFromDiscontinuedOperationsandDisposal" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_NewYorkKingsCountyFirefighterPlaintiffsMember" abstract="true" name="NewYorkKingsCountyFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedOperatingLeaseRightOfUseAsset" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement" abstract="false" name="LineofCreditFacilityMaximumBorrowingCapacityAvailableIncrement" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LossContingencyNumberOfPlaintiffsDismissed" abstract="false" name="LossContingencyNumberOfPlaintiffsDismissed" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="fss_NewJerseyFirefighterPlaintiffsMemberDomain" abstract="true" name="NewJerseyFirefighterPlaintiffsMemberDomain" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_JoeJohnsonEquipmentMember" abstract="true" name="JoeJohnsonEquipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_LackawannaCountyPennsylvaniaMember" abstract="true" name="LackawannaCountyPennsylvaniaMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BlastersMember" abstract="true" name="BlastersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_SupremeCourtofKingsCountyNewYorkMember" abstract="true" name="SupremeCourtofKingsCountyNewYorkMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseObligations" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedFinanceLeaseObligations" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_CommitmentsDisclosureLineItems" abstract="true" name="CommitmentsDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="fss_GuarantorObligationsMaximumExposureUndiscountedAnnualAmount" abstract="false" name="GuarantorObligationsMaximumExposureUndiscountedAnnualAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_CookCountyandDupageCountyMember" abstract="true" name="CookCountyandDupageCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_GroundForceMember" abstract="true" name="GroundForceMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_DistrictofColumbiaFirefighterPlaintiffsMember" abstract="true" name="DistrictofColumbiaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_VehiclesandequipmentMember" abstract="true" name="VehiclesandequipmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_FairValueMeasurementwithUnobservableInputsReconciliationsRecurringBasisForeignCurrencyAdjustment" abstract="false" name="FairValueMeasurementwithUnobservableInputsReconciliationsRecurringBasisForeignCurrencyAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_SettlementAgreementVoidableMember" abstract="true" name="SettlementAgreementVoidableMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_CircuitCourtOfCookCountyMember" abstract="true" name="CircuitCourtOfCookCountyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_FloridaFirefightersPlaintiffsMember" abstract="true" name="FloridaFirefightersPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_DeferredTaxPaymentsUnderCARESAct" abstract="false" name="DeferredTaxPaymentsUnderCARESAct" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_LackawannaFirefighterPlaintiffsMember" abstract="true" name="LackawannaFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_CourtSettlementAxis" abstract="true" name="CourtSettlementAxis" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:dimensionItem" type="xbrli:stringItemType"/>
  <xs:element id="fss_SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit" abstract="false" name="SettlementOfferPerEligiblePlaintiffWhoHasNotAlreadyFiledALawsuit" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_PurchasePriceInclusiveOfPreliminaryClosingAdjustments" abstract="false" name="PurchasePriceInclusiveOfPreliminaryClosingAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_ChangesInFairValueOfContingentConsiderationAndDeferredPayment" abstract="false" name="ChangesInFairValueOfContingentConsiderationAndDeferredPayment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRentalEquipment" abstract="false" name="BusinessCombinationRecognizedIdentifiableAssetsAcquiredAndLiabilitiesAssumedRentalEquipment" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="fss_A2019CreditAgreementMember" abstract="true" name="A2019CreditAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_TowHaulCorporationMember" abstract="true" name="TowHaulCorporationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_OutsideChicagoFirefighterPlaintiffsMember" abstract="true" name="OutsideChicagoFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
  <xs:element id="fss_BuffaloFirefighterPlaintiffsMember" abstract="true" name="BuffaloFirefighterPlaintiffsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="dtr-types1:domainItemType"/>
</xs:schema>
