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<?xml version="1.0" encoding="windows-1252"?> |
<!-- XBRL Document Created with the Workiva Platform --> |
<!-- Copyright 2024 Workiva --> |
<!-- r:5477dac7-d2d2-47a7-834d-65083f9ec46b,g:107e2cac-1e4a-406a-a0da-900a0a5823b1 --> |
<xs:schema xmlns:xs="http://www.w3.org/2001/XMLSchema" xmlns:link="http://www.xbrl.org/2003/linkbase" xmlns:knx="http://www.knight-swiftinc.com/20240424" attributeFormDefault="unqualified" elementFormDefault="qualified" targetNamespace="http://www.knight-swiftinc.com/20240424"> |
| <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://xbrl.sec.gov/dei/2024" schemaLocation="https://xbrl.sec.gov/dei/2024/dei-2024.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="knx-20240424_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="knx-20240424_lab.xml" xlink:role="http://www.xbrl.org/2003/role/labelLinkbaseRef" xlink:type="simple"/> |
| | | <link:roleType id="DocumentandEntityInformation" roleURI="http://www.knight-swiftinc.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> |
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