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Proc-Type: 2001,MIC-CLEAR
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<SEC-DOCUMENT>0001021056-05-000007.txt : 20051116
<SEC-HEADER>0001021056-05-000007.hdr.sgml : 20051116
<ACCEPTANCE-DATETIME>20051116105750
ACCESSION NUMBER:		0001021056-05-000007
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20051114
FILED AS OF DATE:		20051116
DATE AS OF CHANGE:		20051116

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			CROWE JEFFREY C
		CENTRAL INDEX KEY:			0001021056
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	000-21238
		FILM NUMBER:		051208568

	BUSINESS ADDRESS:	
		BUSINESS PHONE:		904-398-9400

	MAIL ADDRESS:	
		STREET 1:		LANDSTAR CORP ACCT
		STREET 2:		13410 SUTTON PARK DR. S.
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			LANDSTAR SYSTEM INC
		CENTRAL INDEX KEY:			0000853816
		STANDARD INDUSTRIAL CLASSIFICATION:	TRUCKING (NO LOCAL) [4213]
		IRS NUMBER:				061313069
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1226

	BUSINESS ADDRESS:	
		STREET 1:		13410 SUTTON PARK DRIVE SOUTH
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224
		BUSINESS PHONE:		9043901234

	MAIL ADDRESS:	
		STREET 1:		LANDSTAR SYSTEM INC
		STREET 2:		13410 SUTTON PARK DRIVE SOUTH
		CITY:			JACKSONVILLE
		STATE:			FL
		ZIP:			32224
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>doc.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
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<ownershipDocument>

    <schemaVersion>X0202</schemaVersion>

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    <periodOfReport>2005-11-14</periodOfReport>

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        <issuerName>LANDSTAR SYSTEM INC</issuerName>
        <issuerTradingSymbol>LSTR</issuerTradingSymbol>
    </issuer>

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            <rptOwnerName>CROWE JEFFREY C</rptOwnerName>
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            <rptOwnerStreet1>13410 SUTTON PARK DRIVE SOUTH</rptOwnerStreet1>
            <rptOwnerStreet2></rptOwnerStreet2>
            <rptOwnerCity>JACKSONVILLE</rptOwnerCity>
            <rptOwnerState>FL</rptOwnerState>
            <rptOwnerZipCode>32224</rptOwnerZipCode>
            <rptOwnerStateDescription></rptOwnerStateDescription>
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        <reportingOwnerRelationship>
            <isDirector>1</isDirector>
            <isOfficer>0</isOfficer>
            <isTenPercentOwner>0</isTenPercentOwner>
            <isOther>0</isOther>
            <officerTitle></officerTitle>
            <otherText></otherText>
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    </reportingOwner>

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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>248000</value>
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            <ownershipNature>
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            <transactionAmounts>
                <transactionShares>
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                <transactionPricePerShare>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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                <value>2005-11-14</value>
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            <transactionTimeliness>
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    </nonDerivativeTable>

    <derivativeTable>
        <derivativeTransaction>
            <securityTitle>
                <value>Stock Options (Right to buy)</value>
            </securityTitle>
            <conversionOrExercisePrice>
                <value>9.0482</value>
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            <transactionDate>
                <value>2005-11-14</value>
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            <deemedExecutionDate>
                <value>2005-11-14</value>
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                <transactionCode>M</transactionCode>
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            <transactionTimeliness>
                <value></value>
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            <transactionAmounts>
                <transactionShares>
                    <value>160000</value>
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                <transactionPricePerShare>
                    <value>0</value>
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                <transactionAcquiredDisposedCode>
                    <value>D</value>
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            </transactionAmounts>
            <exerciseDate>
                <value>2005-01-02</value>
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            <expirationDate>
                <value>2012-01-02</value>
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            <underlyingSecurity>
                <underlyingSecurityTitle>
                    <value>Common Stock</value>
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                <underlyingSecurityShares>
                    <value>160000</value>
                </underlyingSecurityShares>
            </underlyingSecurity>
            <postTransactionAmounts>
                <sharesOwnedFollowingTransaction>
                    <value>0</value>
                </sharesOwnedFollowingTransaction>
            </postTransactionAmounts>
            <ownershipNature>
                <directOrIndirectOwnership>
                    <value>D</value>
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            </ownershipNature>
        </derivativeTransaction>
    </derivativeTable>

    <footnotes></footnotes>

    <ownerSignature>
        <signatureName>James B. Gattoni, Attorney-in-fact</signatureName>
        <signatureDate>2005-11-16</signatureDate>
    </ownerSignature>
</ownershipDocument>
</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
-----END PRIVACY-ENHANCED MESSAGE-----