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

<!--XBRL Document Created with Wdesk from Workiva-->
<!--Copyright 2020 Workiva-->
<!--r:ce597987-5130-479e-96d3-d9ce894fe287,g:c16fcc83-bfe5-448f-aa70-87709f78b617-->
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:wab="http://www.wabtec.com/20200930" xmlns:xbrli="http://www.xbrl.org/2003/instance" xmlns:nonnum="http://www.xbrl.org/dtr/type/non-numeric" xmlns:num="http://www.xbrl.org/dtr/type/numeric" xmlns:xbrldt="http://xbrl.org/2005/xbrldt" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.wabtec.com/20200930">
  <xs:import namespace="http://fasb.org/srt/2020-01-31" schemaLocation="http://xbrl.fasb.org/srt/2020/elts/srt-2020-01-31.xsd"/>
  <xs:import namespace="http://fasb.org/us-gaap/2020-01-31" schemaLocation="http://xbrl.fasb.org/us-gaap/2020/elts/us-gaap-2020-01-31.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/non-numeric" schemaLocation="http://www.xbrl.org/dtr/type/nonNumeric-2009-12-16.xsd"/>
  <xs:import namespace="http://www.xbrl.org/dtr/type/numeric" schemaLocation="http://www.xbrl.org/dtr/type/numeric-2009-12-16.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/dei/2019-01-31" schemaLocation="https://xbrl.sec.gov/dei/2019/dei-2019-01-31.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="wab-20200930_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="wab-20200930_def.xml" xlink:role="http://www.xbrl.org/2003/role/definitionLinkbaseRef" 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="wab-20200930_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="wab-20200930_pre.xml" xlink:role="http://www.xbrl.org/2003/role/presentationLinkbaseRef" xlink:type="simple"/>
      <link:roleType id="CoverPage" roleURI="http://www.wabtec.com/role/CoverPage">
        <link:definition>0001001 - Document - Cover Page</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.wabtec.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETS">
        <link:definition>1001002 - 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.wabtec.com/role/CONDENSEDCONSOLIDATEDBALANCESHEETSParenthetical">
        <link:definition>1002003 - 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="CONDENSEDCONSOLIDATEDSTATEMENTSOFINCOME" roleURI="http://www.wabtec.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFINCOME">
        <link:definition>1003004 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF INCOME</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="CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME" roleURI="http://www.wabtec.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCOMPREHENSIVEINCOME">
        <link:definition>1004005 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME</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="CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS" roleURI="http://www.wabtec.com/role/CONDENSEDCONSOLIDATEDSTATEMENTSOFCASHFLOWS">
        <link:definition>1005006 - Statement - CONDENSED CONSOLIDATED STATEMENTS OF CASH FLOWS</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="CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY" roleURI="http://www.wabtec.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITY">
        <link:definition>1006007 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' 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="CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYParenthetical" roleURI="http://www.wabtec.com/role/CONSOLIDATEDSTATEMENTSOFSHAREHOLDERSEQUITYParenthetical">
        <link:definition>1007008 - Statement - CONSOLIDATED STATEMENTS OF SHAREHOLDERS' EQUITY (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="Business" roleURI="http://www.wabtec.com/role/Business">
        <link:definition>2101101 - Disclosure - Business</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="BusinessDetail" roleURI="http://www.wabtec.com/role/BusinessDetail">
        <link:definition>2402401 - Disclosure - Business (Detail)</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="AccountingPolicies" roleURI="http://www.wabtec.com/role/AccountingPolicies">
        <link:definition>2103102 - Disclosure - 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="AccountingPoliciesPolicies" roleURI="http://www.wabtec.com/role/AccountingPoliciesPolicies">
        <link:definition>2204201 - Disclosure - 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="AccountingPoliciesTables" roleURI="http://www.wabtec.com/role/AccountingPoliciesTables">
        <link:definition>2305301 - Disclosure - Accounting Policies (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="AccountingPoliciesAdditionalInformationDetail" roleURI="http://www.wabtec.com/role/AccountingPoliciesAdditionalInformationDetail">
        <link:definition>2406402 - Disclosure - Accounting Policies - Additional Information (Detail)</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="AccountingPoliciesRemainingPerformanceObligationsDetails" roleURI="http://www.wabtec.com/role/AccountingPoliciesRemainingPerformanceObligationsDetails">
        <link:definition>2407403 - Disclosure - Accounting Policies - Remaining Performance 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="AccountingPoliciesRemainingPerformanceObligationsDetails_1" roleURI="http://www.wabtec.com/role/AccountingPoliciesRemainingPerformanceObligationsDetails_1">
        <link:definition>2407403 - Disclosure - Accounting Policies - Remaining Performance 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="AccountingPoliciesSummaryofReceivablesSoldDetails" roleURI="http://www.wabtec.com/role/AccountingPoliciesSummaryofReceivablesSoldDetails">
        <link:definition>2408404 - Disclosure - Accounting Policies - Summary of Receivables Sold (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="AccountingPoliciesAccumulatedOtherComprehensiveLossbyComponentNetofTaxDetails" roleURI="http://www.wabtec.com/role/AccountingPoliciesAccumulatedOtherComprehensiveLossbyComponentNetofTaxDetails">
        <link:definition>2409405 - Disclosure - Accounting Policies - Accumulated Other Comprehensive Loss by Component, Net of Tax (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="AccountingPoliciesReclassificationsOutofAccumulatedOtherComprehensiveLossDetail" roleURI="http://www.wabtec.com/role/AccountingPoliciesReclassificationsOutofAccumulatedOtherComprehensiveLossDetail">
        <link:definition>2410406 - Disclosure - Accounting Policies - Reclassifications Out of Accumulated Other Comprehensive Loss (Detail)</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.wabtec.com/role/Acquisitions">
        <link:definition>2111103 - 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="AcquisitionsTables" roleURI="http://www.wabtec.com/role/AcquisitionsTables">
        <link:definition>2312302 - 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="AcquisitionsAdditionalInformationDetails" roleURI="http://www.wabtec.com/role/AcquisitionsAdditionalInformationDetails">
        <link:definition>2413407 - Disclosure - Acquisitions - 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="AcquisitionsSummaryofPreliminaryEstimatedFairValuesofGETAssetsAcquiredandLiabilitiesAssumedDetails" roleURI="http://www.wabtec.com/role/AcquisitionsSummaryofPreliminaryEstimatedFairValuesofGETAssetsAcquiredandLiabilitiesAssumedDetails">
        <link:definition>2414408 - Disclosure - Acquisitions - Summary of Preliminary Estimated Fair Values of GET Assets Acquired and Liabilities Assumed (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="AcquisitionsProFormaFinancialInformationDetails" roleURI="http://www.wabtec.com/role/AcquisitionsProFormaFinancialInformationDetails">
        <link:definition>2415409 - Disclosure - Acquisitions - Pro Forma Financial 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="Inventories" roleURI="http://www.wabtec.com/role/Inventories">
        <link:definition>2116104 - 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="InventoriesTables" roleURI="http://www.wabtec.com/role/InventoriesTables">
        <link:definition>2317303 - 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="InventoriesDetails" roleURI="http://www.wabtec.com/role/InventoriesDetails">
        <link:definition>2418410 - Disclosure - 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="Intangibles" roleURI="http://www.wabtec.com/role/Intangibles">
        <link:definition>2119105 - Disclosure - Intangibles</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="IntangiblesTables" roleURI="http://www.wabtec.com/role/IntangiblesTables">
        <link:definition>2320304 - Disclosure - Intangibles (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="IntangiblesChangeintheCarryingAmountofGoodwillbySegmentDetail" roleURI="http://www.wabtec.com/role/IntangiblesChangeintheCarryingAmountofGoodwillbySegmentDetail">
        <link:definition>2421411 - Disclosure - Intangibles - Change in the Carrying Amount of Goodwill by Segment (Detail)</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="IntangiblesAdditionalInformationDetail" roleURI="http://www.wabtec.com/role/IntangiblesAdditionalInformationDetail">
        <link:definition>2422412 - Disclosure - Intangibles - Additional Information (Detail)</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="IntangiblesIntangibleAssetsOtherThanGoodwillandTradeNamesDetail" roleURI="http://www.wabtec.com/role/IntangiblesIntangibleAssetsOtherThanGoodwillandTradeNamesDetail">
        <link:definition>2423413 - Disclosure - Intangibles - Intangible Assets Other Than Goodwill and Trade Names (Detail)</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="IntangiblesAmortizationExpenseDetail" roleURI="http://www.wabtec.com/role/IntangiblesAmortizationExpenseDetail">
        <link:definition>2424414 - Disclosure - Intangibles - Amortization Expense (Detail)</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="ContractAssetsandContractLiabilities" roleURI="http://www.wabtec.com/role/ContractAssetsandContractLiabilities">
        <link:definition>2125106 - Disclosure - Contract Assets and Contract Liabilities</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="ContractAssetsandContractLiabilitiesTables" roleURI="http://www.wabtec.com/role/ContractAssetsandContractLiabilitiesTables">
        <link:definition>2326305 - Disclosure - Contract Assets and Contract Liabilities (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="ContractAssetsandContractLiabilitiesDetails" roleURI="http://www.wabtec.com/role/ContractAssetsandContractLiabilitiesDetails">
        <link:definition>2427415 - Disclosure - Contract Assets and 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="Leases" roleURI="http://www.wabtec.com/role/Leases">
        <link:definition>2128107 - Disclosure - Leases</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="LeasesTables" roleURI="http://www.wabtec.com/role/LeasesTables">
        <link:definition>2329306 - Disclosure - Leases (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="LeasesNarrativeDetails" roleURI="http://www.wabtec.com/role/LeasesNarrativeDetails">
        <link:definition>2430416 - Disclosure - Leases - 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="LeasesLeaseExpenseDetails" roleURI="http://www.wabtec.com/role/LeasesLeaseExpenseDetails">
        <link:definition>2431417 - Disclosure - Leases - Lease Expense (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="LeasesMaturityofLeaseLiabilitiesDetails" roleURI="http://www.wabtec.com/role/LeasesMaturityofLeaseLiabilitiesDetails">
        <link:definition>2432418 - Disclosure - Leases - Maturity of Lease 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="LeasesMaturityofLeaseLiabilitiesDetails_1" roleURI="http://www.wabtec.com/role/LeasesMaturityofLeaseLiabilitiesDetails_1">
        <link:definition>2432418 - Disclosure - Leases - Maturity of Lease 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="LeasesMaturityofLeaseLiabilitiesDetails_2" roleURI="http://www.wabtec.com/role/LeasesMaturityofLeaseLiabilitiesDetails_2">
        <link:definition>2432418 - Disclosure - Leases - Maturity of Lease 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="LeasesLeaseTermandDiscountRateDetails" roleURI="http://www.wabtec.com/role/LeasesLeaseTermandDiscountRateDetails">
        <link:definition>2433419 - Disclosure - Leases - Lease Term and Discount Rate (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="LongTermDebt" roleURI="http://www.wabtec.com/role/LongTermDebt">
        <link:definition>2134108 - Disclosure - Long-Term 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="LongTermDebtTables" roleURI="http://www.wabtec.com/role/LongTermDebtTables">
        <link:definition>2335307 - Disclosure - Long-Term 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="LongTermDebtScheduleofLongtermDebtDetails" roleURI="http://www.wabtec.com/role/LongTermDebtScheduleofLongtermDebtDetails">
        <link:definition>2436420 - Disclosure - Long-Term Debt - Schedule of Long-term Debt (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="LongTermDebtAdditionalInformationDetails" roleURI="http://www.wabtec.com/role/LongTermDebtAdditionalInformationDetails">
        <link:definition>2437421 - Disclosure - Long-Term 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="LongTermDebtInterestCoverageRatioLeverageRatioDetails" roleURI="http://www.wabtec.com/role/LongTermDebtInterestCoverageRatioLeverageRatioDetails">
        <link:definition>2438422 - Disclosure - Long-Term Debt - Interest Coverage Ratio &amp; Leverage Ratio (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="LongTermDebtScheduleofLineofCreditFacilitiesDetails" roleURI="http://www.wabtec.com/role/LongTermDebtScheduleofLineofCreditFacilitiesDetails">
        <link:definition>2439423 - Disclosure - Long-Term Debt - Schedule of Line of Credit Facilities (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="StockBasedCompensation" roleURI="http://www.wabtec.com/role/StockBasedCompensation">
        <link:definition>2140109 - Disclosure - Stock-Based Compensation</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="StockBasedCompensationTables" roleURI="http://www.wabtec.com/role/StockBasedCompensationTables">
        <link:definition>2341308 - Disclosure - Stock-Based Compensation (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="StockBasedCompensationAdditionalInformationDetail" roleURI="http://www.wabtec.com/role/StockBasedCompensationAdditionalInformationDetail">
        <link:definition>2442424 - Disclosure - Stock-Based Compensation - Additional Information (Detail)</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="StockBasedCompensationStockOptionActivityDetail" roleURI="http://www.wabtec.com/role/StockBasedCompensationStockOptionActivityDetail">
        <link:definition>2443425 - Disclosure - Stock-Based Compensation - Stock Option Activity (Detail)</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="StockBasedCompensationFairValueofEachOptionGrantWeightedAverageAssumptionsDetail" roleURI="http://www.wabtec.com/role/StockBasedCompensationFairValueofEachOptionGrantWeightedAverageAssumptionsDetail">
        <link:definition>2444426 - Disclosure - Stock-Based Compensation - Fair Value of Each Option Grant Weighted Average Assumptions (Detail)</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="StockBasedCompensationRestrictedStockActivityandIncentiveStockAwardsActivityDetail" roleURI="http://www.wabtec.com/role/StockBasedCompensationRestrictedStockActivityandIncentiveStockAwardsActivityDetail">
        <link:definition>2445427 - Disclosure - Stock-Based Compensation - Restricted Stock Activity and Incentive Stock Awards Activity (Detail)</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.wabtec.com/role/IncomeTaxes">
        <link:definition>2146110 - 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="IncomeTaxesDetail" roleURI="http://www.wabtec.com/role/IncomeTaxesDetail">
        <link:definition>2447428 - Disclosure - Income Taxes (Detail)</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.wabtec.com/role/EarningsPerShare">
        <link:definition>2148111 - 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="EarningsPerShareTables" roleURI="http://www.wabtec.com/role/EarningsPerShareTables">
        <link:definition>2349309 - 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="EarningsPerShareDetail" roleURI="http://www.wabtec.com/role/EarningsPerShareDetail">
        <link:definition>2450429 - Disclosure - Earnings Per Share (Detail)</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="Warranties" roleURI="http://www.wabtec.com/role/Warranties">
        <link:definition>2151112 - Disclosure - Warranties</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="WarrantiesTables" roleURI="http://www.wabtec.com/role/WarrantiesTables">
        <link:definition>2352310 - Disclosure - Warranties (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="WarrantiesDetail" roleURI="http://www.wabtec.com/role/WarrantiesDetail">
        <link:definition>2453430 - Disclosure - Warranties (Detail)</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="DerivativeFinancialInstrumentsandHedging" roleURI="http://www.wabtec.com/role/DerivativeFinancialInstrumentsandHedging">
        <link:definition>2154113 - Disclosure - Derivative Financial Instruments and Hedging</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="DerivativeFinancialInstrumentsandHedgingTables" roleURI="http://www.wabtec.com/role/DerivativeFinancialInstrumentsandHedgingTables">
        <link:definition>2355311 - Disclosure - Derivative Financial Instruments and Hedging (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="DerivativeFinancialInstrumentsandHedgingAdditionalInformationDetails" roleURI="http://www.wabtec.com/role/DerivativeFinancialInstrumentsandHedgingAdditionalInformationDetails">
        <link:definition>2456431 - Disclosure - Derivative Financial Instruments and Hedging - 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="DerivativeFinancialInstrumentsandHedgingSummaryofNotionalAmountsandFairValueDetails" roleURI="http://www.wabtec.com/role/DerivativeFinancialInstrumentsandHedgingSummaryofNotionalAmountsandFairValueDetails">
        <link:definition>2457432 - Disclosure - Derivative Financial Instruments and Hedging - Summary of Notional Amounts and 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="FairValueMeasurementandFairValueofFinancialInstruments" roleURI="http://www.wabtec.com/role/FairValueMeasurementandFairValueofFinancialInstruments">
        <link:definition>2158114 - Disclosure - Fair Value Measurement and Fair Value of Financial Instruments</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="FairValueMeasurementandFairValueofFinancialInstrumentsTables" roleURI="http://www.wabtec.com/role/FairValueMeasurementandFairValueofFinancialInstrumentsTables">
        <link:definition>2359312 - Disclosure - Fair Value Measurement and Fair Value of Financial Instruments (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="FairValueMeasurementandFairValueofFinancialInstrumentsAssetsandLiabilitiesCarriedatFairValueMeasuredonRecurringBasisDetails" roleURI="http://www.wabtec.com/role/FairValueMeasurementandFairValueofFinancialInstrumentsAssetsandLiabilitiesCarriedatFairValueMeasuredonRecurringBasisDetails">
        <link:definition>2460433 - Disclosure - Fair Value Measurement and Fair Value of Financial Instruments - Assets and Liabilities Carried at Fair Value Measured on Recurring Basis (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="FairValueMeasurementandFairValueofFinancialInstrumentsNarrativeDetails" roleURI="http://www.wabtec.com/role/FairValueMeasurementandFairValueofFinancialInstrumentsNarrativeDetails">
        <link:definition>2461434 - Disclosure - Fair Value Measurement and Fair Value of Financial Instruments - 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="CommitmentsandContingencies" roleURI="http://www.wabtec.com/role/CommitmentsandContingencies">
        <link:definition>2162115 - 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="CommitmentsandContingenciesDetails" roleURI="http://www.wabtec.com/role/CommitmentsandContingenciesDetails">
        <link:definition>2463435 - Disclosure - Commitments and Contingencies (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="SegmentInformation" roleURI="http://www.wabtec.com/role/SegmentInformation">
        <link:definition>2164116 - 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="SegmentInformationTables" roleURI="http://www.wabtec.com/role/SegmentInformationTables">
        <link:definition>2365313 - 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="SegmentInformationAdditionalInformationDetail" roleURI="http://www.wabtec.com/role/SegmentInformationAdditionalInformationDetail">
        <link:definition>2466436 - Disclosure - Segment Information - Additional Information (Detail)</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="SegmentInformationSegmentFinancialInformationDetail" roleURI="http://www.wabtec.com/role/SegmentInformationSegmentFinancialInformationDetail">
        <link:definition>2467437 - Disclosure - Segment Information - Segment Financial Information (Detail)</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="SegmentInformationSalesbyProductDetail" roleURI="http://www.wabtec.com/role/SegmentInformationSalesbyProductDetail">
        <link:definition>2468438 - Disclosure - Segment Information - Sales by Product (Detail)</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="OtherIncomeExpenseNet" roleURI="http://www.wabtec.com/role/OtherIncomeExpenseNet">
        <link:definition>2169117 - Disclosure - Other Income (Expense), Net</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="OtherIncomeExpenseNetTables" roleURI="http://www.wabtec.com/role/OtherIncomeExpenseNetTables">
        <link:definition>2370314 - Disclosure - Other Income (Expense), Net (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="OtherIncomeExpenseNetDetails" roleURI="http://www.wabtec.com/role/OtherIncomeExpenseNetDetails">
        <link:definition>2471439 - Disclosure - Other Income (Expense), Net (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="wab_ContractwithCustomerLiabilityIncreaseDecreaseForeignCurrencyTranslationAdjustment" abstract="false" name="ContractwithCustomerLiabilityIncreaseDecreaseForeignCurrencyTranslationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_PlanTwoThousandElevenMember" abstract="true" name="PlanTwoThousandElevenMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_DebtInstrumentRestrictiveCovenantsLeverageRatioMaximum" abstract="false" name="DebtInstrumentRestrictiveCovenantsLeverageRatioMaximum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsRemainderofFiscalYear" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsRemainderofFiscalYear" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_AccountsReceivableAfterAllowanceForCreditLossMaximumRecurringTransfer" abstract="false" name="AccountsReceivableAfterAllowanceForCreditLossMaximumRecurringTransfer" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_BusinessAcquisitionProFormaGrossProfit" abstract="false" name="BusinessAcquisitionProFormaGrossProfit" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_BasicWeightedAverageCommonSharesOutstandingAndNonVestedRestrictedStockExpectedToVest" abstract="false" name="BasicWeightedAverageCommonSharesOutstandingAndNonVestedRestrictedStockExpectedToVest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wab_ChangeinContractwithCustomerAssetRollForward" abstract="true" name="ChangeinContractwithCustomerAssetRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsNonvestedAggregateIntrinsicValueRollForward" abstract="true" name="SharebasedCompensationArrangementbySharebasedPaymentAwardEquityInstrumentsNonvestedAggregateIntrinsicValueRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_A3.45PercentSeniorNotesDueTwoThousandandTwentySixMember" abstract="true" name="A3.45PercentSeniorNotesDueTwoThousandandTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_GEandPreMergerHoldersMember" abstract="true" name="GEandPreMergerHoldersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_SpinCoClassBPreferredStockMember" abstract="true" name="SpinCoClassBPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_A4150PercentSeniorNotesDueTwoThousandAndTwentyFourMember" abstract="true" name="A4150PercentSeniorNotesDueTwoThousandAndTwentyFourMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_StockGrantedExercisedAndCancelledForVariousEquityInstruments" abstract="false" name="StockGrantedExercisedAndCancelledForVariousEquityInstruments" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wab_TwoThousandandEighteenRefinancingAgreementMember" abstract="true" name="TwoThousandandEighteenRefinancingAgreementMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_NumberOfCountriesWhereProductFound" abstract="false" name="NumberOfCountriesWhereProductFound" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:integerItemType"/>
  <xs:element id="wab_RestrictedStockAndUnitsMember" abstract="true" name="RestrictedStockAndUnitsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberExpectedToVest" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNonvestedNumberExpectedToVest" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:sharesItemType"/>
  <xs:element id="wab_GETBrazilMember" abstract="true" name="GETBrazilMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_A32000PercentSeniorNotesDueTwoThousandAndTwentyFiveMember" abstract="true" name="A32000PercentSeniorNotesDueTwoThousandAndTwentyFiveMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_NonEmployeeDirectorsFeeandStockOptionPlanMember" abstract="true" name="NonEmployeeDirectorsFeeandStockOptionPlanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearThree" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearThree" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_OtherAccruedLiabilitiesMember" abstract="true" name="OtherAccruedLiabilitiesMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_TotalPaymentsDueAbstract" abstract="true" name="TotalPaymentsDueAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_AftermarketMember" abstract="true" name="AftermarketMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_SpinCoClassCPreferredStockMember" abstract="true" name="SpinCoClassCPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_A470PercentSeniorNotesDueTwoThousandAndTwentySixMember" abstract="true" name="A470PercentSeniorNotesDueTwoThousandAndTwentySixMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_GETransportationMember" abstract="true" name="GETransportationMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_DividendsDeclaredCommonShares" abstract="false" name="DividendsDeclaredCommonShares" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_GeneralElectricCompanyMember" abstract="true" name="GeneralElectricCompanyMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_BusinessCombinationPercentageofOutstandingSharesTransferred" abstract="false" name="BusinessCombinationPercentageofOutstandingSharesTransferred" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="wab_FreightSegmentMember" abstract="true" name="FreightSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_TransitSegmentMember" abstract="true" name="TransitSegmentMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_OperatingAndFinanceLeaseLiability" abstract="false" name="OperatingAndFinanceLeaseLiability" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" abstract="true" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardOptionsWeightedAverageRemainingContractualTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_AccountsReceivableSecuritizationPolicyPolicyTextBlock" abstract="false" name="AccountsReceivableSecuritizationPolicyPolicyTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityToBePaidYearOne" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityToBePaidYearOne" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_PlanTwoThousandMember" abstract="true" name="PlanTwoThousandMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_SwingLineSubFacilityMember" abstract="true" name="SwingLineSubFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_FloatingRateNotesDue2021Member" abstract="true" name="FloatingRateNotesDue2021Member" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_WeightedaverageRemainingLeaseTermAbstract" abstract="true" name="WeightedaverageRemainingLeaseTermAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_DebtInstrumentRestrictiveCovenantsEBITDAtoInterestExpenseRatioMinimum" abstract="false" name="DebtInstrumentRestrictiveCovenantsEBITDAtoInterestExpenseRatioMinimum" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="wab_OEMMember" abstract="true" name="OEMMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearTwo" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearTwo" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_LesseeWeightedAverageDiscountRatePercent" abstract="false" name="LesseeWeightedAverageDiscountRatePercent" nillable="true" xbrli:periodType="instant" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="wab_ContractWithCustomerAssetNewContractAdditions" abstract="false" name="ContractWithCustomerAssetNewContractAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_WeightedaverageDiscountRateAbstract" abstract="true" name="WeightedaverageDiscountRateAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_WabtecMember" abstract="true" name="WabtecMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_ComponentsMember" abstract="true" name="ComponentsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_ContractwithCustomerLiabilityRevenueRecognizedfromCurrentYearAdditions" abstract="false" name="ContractwithCustomerLiabilityRevenueRecognizedfromCurrentYearAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestIncludingAdjustments" abstract="false" name="NetIncomeLossIncludingPortionAttributableToNoncontrollingInterestIncludingAdjustments" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_A4375PercentSeniorNotesDueTwoThousandAndTwentyThreeMember" abstract="true" name="A4375PercentSeniorNotesDueTwoThousandAndTwentyThreeMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_EarningsPerShareDenominatorActivityAbstract" abstract="true" name="EarningsPerShareDenominatorActivityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_IntangibleAssetsDisclosureLineItems" abstract="true" name="IntangibleAssetsDisclosureLineItems" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityUndiscountedExcessAmount" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ContractWithCustomerLiabilityNewContractAdditions" abstract="false" name="ContractWithCustomerLiabilityNewContractAdditions" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_DenverTransitInstallationofConstantWirelessCrossingsMember" abstract="true" name="DenverTransitInstallationofConstantWirelessCrossingsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_PremergerWabtecStockholdersMember" abstract="true" name="PremergerWabtecStockholdersMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_CorporateAndEliminationsMember" abstract="true" name="CorporateAndEliminationsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_IncreaseDecreaseInAccruedLiabilitiesAndCustomerDeposits" abstract="false" name="IncreaseDecreaseInAccruedLiabilitiesAndCustomerDeposits" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_NumeratorForBasicAndDilutedEarningsPerCommonShare" abstract="false" name="NumeratorForBasicAndDilutedEarningsPerCommonShare" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_IntangibleAssetsDisclosureTable" abstract="true" name="IntangibleAssetsDisclosureTable" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrldt:hypercubeItem" type="xbrli:stringItemType"/>
  <xs:element id="wab_IntellectualPropertyPatentsAndOtherMember" abstract="true" name="IntellectualPropertyPatentsAndOtherMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_NoncontrollingInterestDecreaseFromBusinessCombination" abstract="false" name="NoncontrollingInterestDecreaseFromBusinessCombination" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ChangeinContractwithCustomerLiabilityRollForward" abstract="true" name="ChangeinContractwithCustomerLiabilityRollForward" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_FinanceLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="FinanceLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_BusinessCombinationConsiderationTransferredCertainIdentifiableAssetsofAcquired" abstract="false" name="BusinessCombinationConsiderationTransferredCertainIdentifiableAssetsofAcquired" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_UndistributedEarningsAllocatedToCommonShareholders" abstract="false" name="UndistributedEarningsAllocatedToCommonShareholders" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNetPerformanceAdjustmentWeightedAverageNetPerformanceAdjustmentFairValue" abstract="false" name="ShareBasedCompensationArrangementByShareBasedPaymentAwardEquityInstrumentsOtherThanOptionsNetPerformanceAdjustmentWeightedAverageNetPerformanceAdjustmentFairValue" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:perShareItemType"/>
  <xs:element id="wab_DigitalElectronicsMember" abstract="true" name="DigitalElectronicsMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_PercentageOfNetIncomeAllocatedToCommonShareholders" abstract="false" name="PercentageOfNetIncomeAllocatedToCommonShareholders" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="num:percentItemType"/>
  <xs:element id="wab_GoodwillDisposals" abstract="false" name="GoodwillDisposals" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_SpinCoClassAPreferredStockMember" abstract="true" name="SpinCoClassAPreferredStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_ContractWithCustomerAssetIncreaseDecreaseForeignCurrencyTranslationAdjustment" abstract="false" name="ContractWithCustomerAssetIncreaseDecreaseForeignCurrencyTranslationAdjustment" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_TermLoanMember" abstract="true" name="TermLoanMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_EarningsPerShareNumeratorActivityAbstract" abstract="true" name="EarningsPerShareNumeratorActivityAbstract" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:stringItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityPaymentsDue" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_DebtInstrumentRestrictedCovenantsLeverageRatio" abstract="false" name="DebtInstrumentRestrictedCovenantsLeverageRatio" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="xbrli:pureItemType"/>
  <xs:element id="wab_LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" abstract="false" name="LesseeOperatingLeaseLiabilityPaymentsDueAfterYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_AmortizationOfIntangibleLiability" abstract="false" name="AmortizationOfIntangibleLiability" nillable="true" xbrli:periodType="duration" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_PeriodicDefinedBenefitsExpenseReversalofExpenseExcludingInterestCostAndServiceCostComponent" abstract="false" name="PeriodicDefinedBenefitsExpenseReversalofExpenseExcludingInterestCostAndServiceCostComponent" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ShorttermAndVariableLeaseCost" abstract="false" name="ShorttermAndVariableLeaseCost" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_OtherAssetsNonCurrentIncludingGoodwillAndIntangibleAssetsNet" abstract="false" name="OtherAssetsNonCurrentIncludingGoodwillAndIntangibleAssetsNet" nillable="true" xbrli:periodType="instant" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_ScheduleofIncentiveStockAwardsActivityandRestrictedStockActivityTableTextBlock" abstract="false" name="ScheduleofIncentiveStockAwardsActivityandRestrictedStockActivityTableTextBlock" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:textBlockItemType"/>
  <xs:element id="wab_LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearFour" abstract="false" name="LesseeOperatingAndFinanceLeaseLiabilityTotalPaymentsDueYearFour" nillable="true" xbrli:periodType="instant" xbrli:balance="credit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
  <xs:element id="wab_USDollarDenominatedTermLoansMember" abstract="true" name="USDollarDenominatedTermLoansMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_MultiCurrencyRevolvingLoanFacilityMember" abstract="true" name="MultiCurrencyRevolvingLoanFacilityMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_SpinCoCommonStockMember" abstract="true" name="SpinCoCommonStockMember" nillable="true" xbrli:periodType="duration" substitutionGroup="xbrli:item" type="nonnum:domainItemType"/>
  <xs:element id="wab_InterestExpenseAndOtherNet" abstract="false" name="InterestExpenseAndOtherNet" nillable="true" xbrli:periodType="duration" xbrli:balance="debit" substitutionGroup="xbrli:item" type="xbrli:monetaryItemType"/>
</xs:schema>
