-----BEGIN PRIVACY-ENHANCED MESSAGE-----
Proc-Type: 2001,MIC-CLEAR
Originator-Name: webmaster@www.sec.gov
Originator-Key-Asymmetric:
 MFgwCgYEVQgBAQICAf8DSgAwRwJAW2sNKK9AVtBzYZmr6aGjlWyK3XmZv3dTINen
 TWSM7vrzLADbmYQaionwg5sDW3P6oaM5D3tdezXMm7z1T+B+twIDAQAB
MIC-Info: RSA-MD5,RSA,
 RABCfJIrdZ0BqwZSr/g3PnOPdfkdNCb4ofDsP2XNW70VykQumbl4xI2mWJAfU4ki
 bf6+1RZo6DfhW4Gx+viFpQ==

<SEC-DOCUMENT>0000099780-03-000052.txt : 20030603
<SEC-HEADER>0000099780-03-000052.hdr.sgml : 20030603
<ACCEPTANCE-DATETIME>20030602182801
ACCESSION NUMBER:		0000099780-03-000052
CONFORMED SUBMISSION TYPE:	4
PUBLIC DOCUMENT COUNT:		1
CONFORMED PERIOD OF REPORT:	20030529
FILED AS OF DATE:		20030603

REPORTING-OWNER:	

	OWNER DATA:	
		COMPANY CONFORMED NAME:			GAFFORD RONALD J
		CENTRAL INDEX KEY:			0001222591

	FILING VALUES:
		FORM TYPE:		4
		SEC ACT:		1934 Act
		SEC FILE NUMBER:	001-06903
		FILM NUMBER:		03728928

	MAIL ADDRESS:	
		STREET 1:		TRINITY INDUSTRIES INC
		STREET 2:		2525 STEMMONS FREEWAY
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75207

ISSUER:		

	COMPANY DATA:	
		COMPANY CONFORMED NAME:			TRINITY INDUSTRIES INC
		CENTRAL INDEX KEY:			0000099780
		STANDARD INDUSTRIAL CLASSIFICATION:	RAILROAD EQUIPMENT [3743]
		IRS NUMBER:				750225040
		STATE OF INCORPORATION:			DE
		FISCAL YEAR END:			1231

	BUSINESS ADDRESS:	
		STREET 1:		2525 STEMMONS FREEWAY
		CITY:			DALLAS
		STATE:			TX
		ZIP:			75207-2401
		BUSINESS PHONE:		214-631-4420

	FORMER COMPANY:	
		FORMER CONFORMED NAME:	TRINITY STEEL CO INC
		DATE OF NAME CHANGE:	19720407
</SEC-HEADER>
<DOCUMENT>
<TYPE>4
<SEQUENCE>1
<FILENAME>edgar.xml
<DESCRIPTION>PRIMARY DOCUMENT
<TEXT>
<XML>
<?xml version="1.0"?>
<ownershipDocument>
    <schemaVersion>X0101</schemaVersion>

    <documentType>4</documentType><periodOfReport>2003-05-29</periodOfReport>
    <issuer>
        <issuerCik>0000099780</issuerCik>
        <issuerName>TRINITY INDUSTRIES INC</issuerName>
        <issuerTradingSymbol>NYSE/TRN</issuerTradingSymbol></issuer><reportingOwner><reportingOwnerId>
            <rptOwnerCik>0001222591</rptOwnerCik>
            <rptOwnerName>GAFFORD RONALD J</rptOwnerName>
        </reportingOwnerId>
        <reportingOwnerAddress>
            <rptOwnerStreet1>  </rptOwnerStreet1>
            <rptOwnerStreet2>  </rptOwnerStreet2>
            <rptOwnerCity>  </rptOwnerCity>
            <rptOwnerState>  </rptOwnerState>
            <rptOwnerZipCode>  </rptOwnerZipCode>
        </reportingOwnerAddress>
            <reportingOwnerRelationship>
<isDirector>1</isDirector><isOfficer>0</isOfficer><isTenPercentOwner>0</isTenPercentOwner><isOther>0</isOther></reportingOwnerRelationship></reportingOwner><derivativeSecurity><securityTitle><value>Stock Option (right to buy)</value></securityTitle><conversionOrExercisePrice><value>17</value></conversionOrExercisePrice><transactionDate><value>2003-05-29</value></transactionDate><transactionCoding><transactionFormType>4</transactionFormType><transactionCode>A</transactionCode><equitySwapInvolved>0</equitySwapInvolved></transactionCoding><transactionAmounts><transactionShares><value>5000</value></transactionShares><transactionValue><value>0</value></transactionValue><transactionAcquiredDisposedCode><value>A</value></transactionAcquiredDisposedCode></transactionAmounts><exerciseDate><value>2003-05-29</value></exerciseDate><expirationDate><value>2013-05-29</value></expirationDate><underlyingSecurity><underlyingSecurityTitle><value>Common Stock</value></underlyingSecurityTitle><underlyingSecurityShares><value>500
0</value></underlyingSecurityShares></underlyingSecurity><postTransactionAmounts><sharesOwnedFollowingTransaction><value>5000</value></sharesOwnedFollowingTransaction></postTransactionAmounts><ownershipNature><directOrIndirectOwnership><value>D</value></directOrIndirectOwnership><natureOfOwnership><value></value></natureOfOwnership></ownershipNature></derivativeSecurity><footnotes/><ownerSignature><signatureName>Michael G. Fortado  For:  Ronald J. Gafford</signatureName><signatureDate>2003-06-02</signatureDate></ownerSignature></ownershipDocument>

</XML>
</TEXT>
</DOCUMENT>
</SEC-DOCUMENT>
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