    <SEC-DOCUMENT>0000099780-21-000032-index.html : 20210401
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    <ACCEPTANCE-DATETIME>20210401085947
    ACCESSION NUMBER:		0000099780-21-000032
    CONFORMED SUBMISSION TYPE:	DEF 14A
    PUBLIC DOCUMENT COUNT:		16
    CONFORMED PERIOD OF REPORT:	20210503
    FILED AS OF DATE:		20210401
    DATE AS OF CHANGE:		20210401

    FILER:

    	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

    	FILING VALUES:
    		FORM TYPE:		DEF 14A
    		SEC ACT:		1934 Act
    		SEC FILE NUMBER:	001-06903
    		FILM NUMBER:		21796184

    	BUSINESS ADDRESS:
    		STREET 1:		14221 N DALLAS PARKWAY
    		STREET 2:		SUITE 1100
    		CITY:			DALLAS
    		STATE:			TX
    		ZIP:			75254
    		BUSINESS PHONE:		214-631-4420

    	MAIL ADDRESS:
    		STREET 1:		14221 N DALLAS PARKWAY
    		STREET 2:		SUITE 1100
    		CITY:			DALLAS
    		STATE:			TX
    		ZIP:			75254

    	FORMER COMPANY:
    		FORMER CONFORMED NAME:	TRINITY STEEL CO INC
    		DATE OF NAME CHANGE:	19720407
    </SEC-HEADER>
    <DOCUMENT>
    <TYPE>DEF 14A
    <SEQUENCE>1
    <FILENAME>a2021proxystatement.htm
    <DESCRIPTION>DEF 14A
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    Document 1 - file: a2021proxystatement.htm

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    Document 12 - file: image_11a.jpg

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    Document 13 - file: image_81.jpg

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    <FILENAME>signature72a.jpg
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    Document 14 - file: signature72a.jpg

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    <FILENAME>trinityindustriesinc52719ab.jpg
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    Document 15 - file: trinityindustriesinc52719ab.jpg

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