Exhibit 3.1


                            CERTIFICATE OF AMENDMENT

                                       TO

                          CERTIFICATE OF INCORPORATION

                                       OF

                            TRINITY INDUSTRIES, INC.


     Pursuant to the provisions of Section 242 of the General Corporation
Law of Delaware, the undersigned hereby certifies the following amendment
to the Certificate of Incorporation, as amended, of TRINITY INDUSTRIES, INC.
(the "Company") has been duly adopted in accordance with the provisions of
Section 242, to-wit:


     This Certificate of Amendment to the Certificate of Incorporation, as
amended, amends the first paragraph of Article IV of the Certificate of
Incorporation, as amended, for the Company, as heretofore amended, supplemented
and restated, by deleting the first paragraph of Article IV thereof and
substituting in lieu thereof a new paragraph, which shall read in its entirety
as follows:

                                  "ARTICLE IV.
                                  ------------

                            Authorized Capital Stock
                            ------------------------

     The total number of shares of stock which the corporation shall have
authority to issue is Two Hundred and One Million and Five Hundred Thousand
(201,500,000) shares, of which One Million Five Hundred Thousand (1,500,000)
shares shall be voting Preferred Stock without par value and Two Hundred Million
(200,000,000) shares shall be Common Stock with a par value of One Dollar
($1.00) per share."

     IN WITNESS WHEREOF, this Certificate of Amendment to the Certificate of
Incorporation, as amended, has been executed by a duly authorized officer of the
Company this 23rd day of May, 2007.


TRINITY INDUSTRIES, INC.


By: /s/ Paul M. Jolas
    ----------------------------------------
    Paul M. Jolas
    Deputy General Counsel -- Corporate and
    Transactions, and Corporate Secretary





                                                                     EXHIBIT 3.1

                                                                          PAGE 1

                                STATE OF DELAWARE

                        OFFICE OF THE SECRETARY OF STATE


                                   ----------


         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
AMENDMENT OF "TRINITY INDUSTRIES, INC.", FILED IN THIS OFFICE ON THE EIGHTEENTH
DAY OF DECEMBER, A.D. 1987, AT 10 O'CLOCK A.M.



                                             /s/ EDWARD J. FREEL
                                             -----------------------------------
                                             Edward J. Freel, Secretary of State

                                     [SEAL]

2098029 8100                                 AUTHENTICATION: 0779754

001549195                                              DATE: 11-08-00




                                                                         [STAMP]

                         CERTIFICATE TO FIRST AMENDMENT

                                       TO

                          CERTIFICATE OF INCORPORATION

                                       OF

                            TRINITY INDUSTRIES, INC.


         Pursuant to the provisions of Section 242 of the General Corporation
Law of Delaware, the undersigned hereby certify that the following amendment to
the Certificate of Incorporation of TRINITY INDUSTRIES, INC. (the "Company") has
been duly adopted in accordance with the provisions of Section 242, to-wit:

         Article XI is added to the Certificate of Incorporation of the Company
to read in its entirety as follows:

                                   ARTICLE XI

         No director of the corporation shall be personally liable to the
corporation or its stockholders for monetary damages for breach of fiduciary
duty as a director, except for liability (i) for any breach of the director's
duty of loyalty to the corporation or its stockholders, (ii) for acts or
omissions not in good faith or which involve intentional misconduct or a knowing
violation of law, (iii) under Section 174 of the Delaware General Corporation
Law, or (iv) for any transaction from which the director derived an improper
personal benefit. Any repeal or modification of the foregoing provisions of this
Article XI by the stockholders of the corporation shall not adversely affect any
right or protection of a director of the corporation existing at the time of
such repeal or modification.

         IN WITNESS WHEREOF, the undersigned have executed this document as of
December 15th, 1987.

                                        TRINITY INDUSTRIES, INC.

                                        By: /s/ F. DEAN PHELPS, JR.
                                           -------------------------------------
                                           F. Dean Phelps, Jr.
                                           Vice President

ATTEST:

/s/ J. J. FRENCH, JR.
- -------------------------------
J. J. French, Jr.
Secretary



                                                                          PAGE 1

                                STATE OF DELAWARE

                        OFFICE OF THE SECRETARY OF STATE

                                   ----------

         I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO
HEREBY CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
AMENDMENT OF "TRINITY INDUSTRIES, INC.", FILED IN THIS OFFICE ON THE SIXTH DAY
OF AUGUST, A.D. 1993, AT 1:30 O'CLOCK P.M.




                                             /s/ EDWARD J. FREEL
                                             -----------------------------------
                                             Edward J. Freel, Secretary of State

                                     [SEAL]

2098029 8100                                 AUTHENTICATION: 0779755

001549195                                              DATE: 11-08-00




                                                                         [STAMP]

                                SECOND AMENDMENT

                                       TO

                          CERTIFICATE OF INCORPORATION

                                       OF

                            TRINITY INDUSTRIES, INC.


         Pursuant to the provisions of Section 242 of the General Corporation
Law of Delaware, the undersigned hereby certify the following amendment to the
Certificate of Incorporation of TRINITY INDUSTRIES, INC. (the "Company") has
been duly adopted in accordance with the provisions of Sections 242, to-wit:

         Article IV of the Company's Certificate of Incorporation is amended to
increase the authorized number of shares of stock that the Company shall have
authority to issue from Forty One Million Five Hundred Thousand (41,500,000)
shares to One Hundred One Million Five Hundred Thousand (101,500,000) shares
and the authorized number of shares of Common Stock from Forty Million
(40,000,000) shares to One Hundred Million (100,000,000) shares by substituting
the following in lieu of the existing Article IV of the Certificate of
Incorporation so that Article IV as amended shall read in its entirety as
follows:

                                  "ARTICLE IV.

                            Authorized Capital Stock

                  The total number of shares of stock which the corporation
         shall have authority to issue is One Hundred and One Million Five
         Hundred Thousand (101,500,000) shares, of which One Million Five
         Hundred Thousand (1,500,000) shares shall be voting Preferred Stock
         without par value and One Hundred Million (100,000,000) shares shall be
         Common Stock with a par value of One Dollar ($1.00) per share.

                  The following is a statement of the designations and the
         powers, preferences and rights, and the qualifications, limitations or
         restrictions thereof in respect of the shares of Preferred Stock and
         Common Stock of the corporation and of the authority expressly granted
         hereby to the Board of Directors of the corporation to fix by
         resolution or resolutions any of such designations and powers,
         preferences and rights, and qualifications, limitations and
         restrictions thereof that may be desired but which shall not be fixed
         by this Certificate of Incorporation.





                  A. Preferred Stock. The following is a statement of the
         designations and the powers, preferences and rights, and the
         qualifications, limitations or restrictions thereof in respect of the
         shares of Preferred Stock.

                           1. Voting Rights of Preferred Stock. In addition to
         such voting rights as may from time to time be required by the laws of
         Delaware, the holders of Preferred Stock shall vote at such times as
         holders of Common Stock may vote and in a like manner, one vote for
         each share of stock held, and all shares of the corporation shall be
         voted as a single class, except where specifically required by law to
         vote separately.

                           2. Provisions Regarding Issuance. The Preferred Stock
         may be issued from time to time in one or more series and in such
         amounts and for such consideration as may be determined by the Board of
         Directors. The designations, powers, preferences, and relative
         participating, optional, conversion and other special rights, and the
         qualifications, limitations or restrictions thereof, of the Preferred
         Stock, and as between the series of the Preferred Stock, shall be as
         are fixed herein and, to the extent not fixed herein, shall be such,
         not inconsistent with the provisions of this Article IV, as may be
         fixed by the Board of Directors, authority so to do being hereby
         expressly granted, and stated in a resolution or resolutions adopted by
         the Board of Directors providing for the issue of such series (herein
         called "Directors' Resolution"). The Directors' Resolution as to any
         series shall (a) designate the series, (b) fix the dividend rate of
         such series, the payment dates for dividends on shares of such series
         and, if the Board of Directors deems it advisable to cause dividends to
         be cumulative, the date or dates, or the method of determining the date
         or dates, from which dividends on shares of such series shall be
         cumulative, (c) fix the amount or amounts payable on shares of such
         series upon voluntary liquidation, dissolution or winding up, (d) state
         the price or prices at which, and the terms and conditions on which,
         the shares of such series may be redeemed at the option of the
         corporation; and such Directors' Resolution may, in a manner not
         inconsistent with the provisions of this Article IV, (i) limit the
         number of shares of such series which may be issued, (ii) provide for a
         sinking fund for the purchase or redemption of shares of such series
         and determine the terms and conditions governing the operation of any
         such fund, (iii) impose conditions or restrictions upon the creation of
         indebtedness or upon



                                      -2-


         the issue of any additional stock (including additional shares of such
         series or of any other series or of any other class) ranking on a
         parity with or prior to the shares of such series as to dividends or
         distribution of assets on liquidation, dissolution or winding up, (iv)
         impose conditions or restrictions upon the payment of dividends upon,
         or the making of other distributions to, or the redemption or
         acquisition of, shares of such series, or shares of junior stock
         theretofore issued, or any shares of any class of stock thereafter to
         be issued, or any shares of Preferred Stock theretofore issued ranking
         inferior to such series (as to dividends or distribution of assets on
         liquidation, dissolution or winding up) to the extent that the terms of
         such shares theretofore issued do not expressly prohibit the imposition
         of such conditions or restrictions, or any shares of Preferred Stock
         theretofore issued ranking prior to or on a parity with such series (as
         to dividends or distribution of assets on liquidation, dissolution or
         winding up) to the extent that the terms of such shares theretofore
         issued expressly permit the imposition of such conditions or
         restrictions, (v) grant rights of conversion or exchange of shares of
         such series into or for shares of junior stock, and (vi) grant such
         other special rights as shall not be inconsistent with the provisions
         of this Article IV. The term "junior stock," as used in this Article
         IV, shall mean shares of capital stock of the corporation ranking
         junior to Preferred Stock as to dividends and distribution of assets on
         liquidation, dissolution or winding up.

                           3. General Provisions. Subject to such further
         conditions or restrictions as may be imposed in any Directors'
         Resolution, so long as any shares of the Preferred Stock are
         outstanding, in no event shall any dividends whatsoever, whether in
         cash, stock or otherwise, be paid or declared, or any distribution be
         made, on any junior stock, nor shall any shares of junior stock (other
         than junior stock acquired in exchange for or out of the proceeds of
         the issue of other junior stock or out of contributions to the capital
         of the corporation) be purchased, redeemed, retired or otherwise
         acquired for a valuable consideration by the corporation:

                           (1) unless all dividends on the Preferred Stock for
                  all past dividend periods shall have been paid or declared and
                  a sum sufficient for the payment thereof set apart, and the
                  full dividend thereon for the then current dividend period
                  shall have been paid or declared, and



                                      -3-


                           (2) unless, as to each series of Preferred Stock for
                  which a sinking fund shall have been provided in the
                  Directors' Resolution providing for the issuance of such
                  series, the corporation shall have set aside the sum or sums
                  required to be set aside by such Directors' Resolution, to be
                  applied in the manner specified therein.

                  Subject to such conditions or restrictions as may be imposed
         in any Directors' Resolution, the corporation at the option of the
         Board of Directors may redeem in whole or in part the Preferred Stock
         of such series which by its terms is redeemable, at the time or times
         and on the terms and conditions fixed by the Directors' Resolution as
         to such series in accordance with the terms applicable to such
         Preferred Stock.

                  Any moneys set aside by the corporation and unclaimed at the
         end of six years from the date fixed for redemption shall revert to the
         general funds of the corporation.

                  So long as any shares of the Preferred Stock are outstanding,
         the corporation shall not amend, alter or repeal any of the provisions
         of this Article IV so as to affect adversely the rights, powers or
         preferences of the Preferred Stock or of the holders thereof, nor shall
         any consent or vote otherwise effective under said Article be effective
         with respect to the rights, powers or preferences of such Preferred
         Stock or be binding upon the holders of such Preferred Stock, without
         the consent of the holders of at least two-thirds (2/3) of the number
         of all outstanding shares of the Preferred Stock (and such further
         consent of that proportion of the holders of the shares of any one or
         more particular series, if any, as may be required by the Directors'
         Resolution or Resolutions providing for the issuance of such one or
         more particular series), given in person or by proxy, by vote at a
         meeting called for that purpose.

                  So long as shares of a particular series of Preferred Stock
         are outstanding, the corporation shall not amend, alter or repeal any
         provision of the Directors' Resolution providing for the issuance of
         such series so as to affect adversely the rights, powers or preferences
         of the shares of such series or of the holders thereof, without the
         consent of the holders of at lease two-thirds (2/3) of the number of
         outstanding shares of said series, given in person or by proxy, by vote
         at a meeting called for that purpose.



                                      -4-



                  In the event of any liquidation, dissolution or winding up of
         the corporation, then, before any distribution or payment shall be made
         to the holder of any junior stock, the holders of the Preferred Stock
         of each series shall be entitled to be paid, in the event of a
         voluntary or involuntary liquidation, dissolution or winding up, such
         preferential amounts as may be fixed for such series in the Directors'
         Resolution providing for the issuance thereof. After such payment shall
         have been made in full to the holders of the Preferred Stock, the
         remaining assets and funds of the corporation shall be distributed
         among the holders of junior stock according to their respective rights.
         In the event that the assets of the corporation available for
         distribution to holders of Preferred Stock shall not be sufficient to
         make the payments herein required to be made in full, such assets shall
         be distributed to the holders of the respective shares of Preferred
         Stock in accordance with such priorities, if any, as between the
         various series of Preferred Stock as may be specified in any Directors'
         Resolution.

                  Preferred Stock redeemed or otherwise retired by the
         corporation assumes the status of authorized but unissued Preferred
         Stock and may thereafter, subject to the provisions of any Directors'
         Resolution providing for the issue of any particular series of
         Preferred Stock, be reissued in the same manner as authorized but
         unissued Preferred Stock.

                  B. Common Stock.

                           1. Dividends. Subject to the prior rights and
         preferences of the Preferred Stock, and subject to the provisions and
         on the conditions set forth in the foregoing paragraph A of this
         Article IV, or in any Directors' Resolution providing for the issue of
         a series of Preferred Stock, such dividends (payable in cash, stock or
         otherwise) as may be determined by the Board of Directors may be
         declared and paid on the Common Stock from time to time out of any
         funds legally available therefor.

                           2. Voting. Except as otherwise required by law, each
         share of Common Stock shall have one vote, in person or by proxy, for
         each share thereof held, and all shares of the corporation, including
         shares of Preferred Stock shall be voted as a single class except where
         specifically required by law to vote separately.



                                      -5-


                           3. Distribution. After payment shall have been made
         in full to the holders of the Preferred Stock in the event of any
         liquidation, dissolution or winding up of the affairs of the
         corporation, the remaining assets and funds of the corporation shall be
         distributed among the holders of the Common Stock according to their
         respective shares.

                  C. Pre-emptive Rights. No holder of any stock of the
         corporation shall be entitled as a matter of right to purchase or
         subscribe for any part of any stock of the corporation, authorized by
         this Article IV, or of any additional stock of any class to be issued
         by reason of any increase of the authorized stock of the corporation,
         or of any bonds, certificates of indebtedness, debentures or other
         securities convertible into stock of the corporation, but any stock
         authorized by this Article IV or any such additional authorized issue
         of new stock or of securities convertible into stock may be issued and
         disposed of by the Board of Directors to such persons, firms,
         corporations or associations for such consideration and upon such terms
         and in such manner as the Board of Directors may in their discretion
         determine without offering any thereof on the same terms or on any
         terms to the stockholders then of record or to any class of
         stockholders.

                  D. Miscellaneous. The corporation shall be entitled to treat
         the person in whose name any share, right or option is registered as
         the owner thereof for all purposes and shall not he bound to recognize
         any equitable or other claim to or interest in such share, right or
         option on the part of any other person, whether or not the corporation
         shall have notice thereof, save as may be expressly provided by the
         laws of the State of Delaware.

                  A Director shall be fully protected in relying in good faith
         upon the books of account of the corporation or statements prepared by
         any of its officials as to the value and amount of the assets,
         liabilities and/or net profits of the corporation, or any other facts
         pertinent to the existence and amount of surplus or other funds from
         which dividends might properly be declared and paid.

                  Without action by the stockholders, the shares of stock may be
         issued by the corporation from time to time for such consideration (not
         less than the par value thereof if such stock has a par value) as may
         be fixed from time to time by the Board of Directors, and any and



                                      -6-

     all such shares so issued, the full consideration for which has been paid
     or delivered, shall be deemed fully paid stock and not liable to any
     further call or assessment thereon, and the holder of such shares shall not
     be liable for any further call or assessment thereon, or for any other
     payment thereof."

     IN WITNESS WHEREOF, the undersigned have executed this document as of
August 5, 1993.

                                       TRINITY INDUSTRIES, INC.



                                       By: /s/ F. DEAN PHELPS, JR.
                                           ------------------------------------
                                               F. Dean Phelps, Jr.
                                               Vice President


ATTEST:


/s/ J. J. FRENCH, JR.
- ---------------------------------------
J. J. French, Jr., Secretary





                                      -7-


                          CERTIFICATE OF INCORPORATION

                                       OF

                            TRINITY INDUSTRIES, INC.


                                   ARTICLE I.

                                      Name

         The name of the corporation is Trinity Industries, Inc.

                                   ARTICLE II.

                           Registered Office and Agent

         The address of its registered office in the State of Delaware is
Corporation Trust Center, 1209 Orange Street, in the City of Wilmington, County
of New Castle. The name of its registered agent at such address is The
Corporation Trust Company.

                                  ARTICLE III.

                                     Purpose

         The purposes for which the corporation is organized are as follows:

         1. To design and manufacture products of every description fabricated
in the various grades of ferrous and non-ferrous metals and their alloys, and to
buy, sell and otherwise deal therein.

         2. To construct, build, manufacture, maintain, overhaul, repair and
erect structures of every kind and description manufactured of various grades of
ferrous and non-ferrous metals and their alloys, and to contract for the
construction and erection of such structures.





         3. To manufacture, buy, sell, procure, distribute, market, exchange,
import, export and in any other manner deal in or deal with (as principal, agent
or otherwise) steel pressure vessels, refinery equipment, oil field supplies,
poles and other products fabricated of various grades of ferrous and non-ferrous
metals and their alloys, as well as materials, parts, instruments, devices and
any other equipment, tools, parts, components and supplies.

         4. To acquire by purchase, lease or otherwise erect, maintain, operate,
lease, mortgage and otherwise deal in and deal with buildings, warehouses,
storehouses, manufacturing plants, factories, machine shops and any other
structures and equipment necessary, useful or desirable for the conduct of the
business of the corporation.

         5. To manufacture, purchase or otherwise acquire and to hold, own,
mortgage or otherwise lien, pledge, lease, sell, assign, exchange, transfer or
in any manner dispose of, and to invest, deal and trade in and with goods, wares
and merchandise and personal property of any and every class or description
within or without the State of Delaware.

         6. To acquire the good will, rights and property and to undertake the
whole or any part of the assets and liabilities of any person, firm, association
or corporation; to pay for the same in cash, the stock of the corporation, bonds
or otherwise; to hold or in any manner to dispose of the whole or any part of
the property so purchased; to conduct in any lawful manner the whole



                                      -2-


or any part of any business so acquired, and to exercise all the powers
necessary or convenient in and about the conduct and management of such
business.

         7. To purchase or otherwise acquire, apply for, register, hold, use,
sell or in any manner dispose of, and to grant licenses or other rights in, and
in any manner deal with, patents, inventions, improvements, processes, formulas,
trademarks, trade names, rights and licenses secured under letters patent,
copyrights or otherwise.

         8. To enter into, make and perform contracts of every kind for any
lawful purpose, with any person, firm, association or corporation, town, city,
county, body politic, state, territory, government or colony or dependency
thereof.

         9. To render general and special services and advice, and to do all
things as may be necessary or convenient in carrying out any or all of the
foregoing purposes.

         10. To engage in any lawful act or activity for which corporations may
be organized under the General Corporation Law of Delaware.

         11. The objects and purposes specified herein shall be regarded as
independent objects and purposes and, except where otherwise expressed, shall in
no way be limited nor restricted by reference to or inference from the terms of
any other clause or paragraph of this Certificate of Incorporation.

         12. The foregoing shall be construed both as objects and powers, and
the enumeration thereof shall not be held to limit or



                                      -3-


restrict in any manner the general powers conferred on the corporation by the
laws of the State of Delaware.

                                   ARTICLE IV.

                            Authorized Capital Stock

         The total number of shares of stock which the corporation shall have
authority to issue is Forty-One Million Five Hundred Thousand (41,500,000)
shares, of which One Million Five Hundred Thousand (1,500,000) shares shall be
voting Preferred Stock without par value and Forty Million (40,000,000) shares
shall be Common Stock with a par value of One Dollar ($1.00) per share.

         The following is a statement of the designations and the powers,
preferences and rights, and the qualifications, limitations or restrictions
thereof in respect of the shares of Preferred Stock and Common Stock of the
corporation and of the authority expressly granted hereby to the Board of
Directors of the corporation to fix by resolution or resolutions any of such
destinations and powers, preferences and rights, and qualifications, limitations
and restrictions thereof that may be desired but which shall not be fixed by
this Certificate of Incorporation.

         A. Preferred Stock. The following is a statement of the designations
and the powers, preferences and rights, and the qualifications, limitations or
restrictions thereof in respect of the shares of Preferred Stock.



                                      -4-


                  1. Voting Rights of Preferred Stock. In addition to such
voting rights as may from time to time be required by the laws of Delaware, the
holders of Preferred Stock shall vote at such times as holders of Common Stock
may vote and in a like manner, one vote for each share of stock held, and all
shares of the corporation shall be voted as a single class, except where
specifically required by law to vote separately.

                  2. Provisions Regarding Issuance. The Preferred Stock may be
issued from time to time in one or more series and in such amounts and for such
consideration as may be determined by the Board of Directors. The designations,
powers, preferences, and relative participating, optional, conversion and other
special rights, and the qualifications, limitations or restrictions thereof, of
the Preferred Stock, and as between the series of the Preferred Stock, shall be
as are fixed herein and, to the extent not fixed herein, shall be such, not
inconsistent with the provisions of this Article IV, as may be fixed by the
Board of Directors, authority so to do being hereby expressly granted, and
stated in a resolution or resolutions adopted by the Board of Directors
providing for the issue of such series (herein called "Directors' Resolution").
The Directors' Resolution as to any series shall (a) designate the series, (b)
fix the dividend rate of such series, the payment dates for dividends on shares
of such series and, if the Board of Directors deems it advisable to cause
dividends to be cumulative, the date or dates, or the method of determining the
date or dates, from which dividends on shares of such series shall be
cumulative, (c) fix the amount or amounts



                                      -5-


payable on shares of such series upon voluntary liquidation, dissolution or
winding up, (d) state the price or prices at which, and the terms and conditions
on which, the shares of such series may be redeemed at the option of the
corporation; and such Directors' Resolution may, in a manner not inconsistent
with the provisions of this Article IV, (i) limit the number of shares of such
series which may be issued, (ii) provide for a sinking fund for the purchase or
redemption of shares of such series and determine the terms and conditions
governing the operation of any such fund, (iii) impose conditions or
restrictions upon the creation of indebtedness or upon the issue of any
additional stock (including additional shares of such series or of any other
series or of any other class) ranking on a parity with or prior to the shares of
such series as to dividends or distribution of assets on liquidation,
dissolution or winding up, (iv) impose conditions or restrictions upon the
payment of dividends upon, or the making of other distributions to, or the
redemption or acquisition of, shares of such series, or shares of junior stock
theretofore issued, or any shares of any class of stock thereafter to be issued,
or any shares of Preferred Stock theretofore issued ranking inferior to such
series (as to dividends or distribution of assets on liquidation, dissolution or
winding up) to the extent that the terms of such shares theretofore issued do
not expressly prohibit the imposition of such conditions or restrictions, or any
shares of Preferred Stock theretofore issued ranking prior to or on a parity
with such series (as to dividends or distribution of



                                      -6-


assets on liquidation, dissolution or winding up) to the extent that the terms
of such shares theretofore issued expressly permit the imposition of such
conditions or restrictions, (v) grant rights of conversion or exchange of shares
of such series into or for shares of junior stock, and (vi) grant such other
special rights as shall not be inconsistent with the provisions of this Article
IV. The term "junior stock," as used in this Article IV, shall mean shares of
capital stock of the corporation ranking junior to Preferred Stock as to
dividends and distribution of assets on liquidation, dissolution or winding up.

                  3. General Provisions. Subject to such further conditions or
restrictions as may be imposed in any Directors' Resolution, so long as any
shares of the Preferred Stock are outstanding, in no event shall any dividends
whatsoever, whether in cash, stock or otherwise, be paid or declared, or any
distribution be made, on any junior stock, nor shall any shares of junior stock
(other than junior stock acquired in exchange for or out of the proceeds of the
issue of other junior stock or out of contributions to the capital of the
corporation) be purchased, redeemed, retired or otherwise acquired for a
valuable consideration by the corporation:

                           (1) unless all dividends on the Preferred Stock for
                  all past dividend periods shall have been paid or declared and
                  a sum sufficient for the payment thereof set apart, and the
                  full dividend thereon for the then current dividend period
                  shall have been paid or declared, and



                                      -7-


                           (2) unless, as to each series of Preferred Stock for
                  which a sinking fund shall have been provided in the
                  Directors' Resolution providing for the issuance of such
                  series, the corporation shall have set aside the sum or sums
                  required to be set aside by such Directors' Resolution, to be
                  applied in the manner specified therein.

                  Subject to such conditions or restrictions as may be imposed
in any Directors' Resolution, the corporation at the option of the Board of
Directors may redeem in whole or in part the Preferred Stock of such series
which by its terms is redeemable, at the time or times and on the terms and
conditions fixed by the Directors' Resolution as to such series in accordance
with the terms applicable to such Preferred Stock.

                  Any moneys set aside by the corporation and unclaimed at the
end of six years from the date fixed for redemption shall revert to the general
funds of the corporation.

                  So long as any shares of the Preferred Stock are outstanding,
the corporation shall not amend, alter or repeal any of the provisions of this
Article IV so as to affect adversely the rights, powers or preferences of the
Preferred Stock or of the holders thereof, nor shall any consent or vote
otherwise effective under said Article be effective with respect to the rights,
powers or preferences of such Preferred Stock or be binding upon the holders of
such Preferred Stock, without the consent of the holders of at least two-thirds
(2/3) of the number of all outstanding shares of the Preferred Stock (and such
further consent of that proportion of the holders of the shares of any one



                                      -8-


or more particular series, if any, as may be required by the Directors'
Resolution or Resolutions providing for the issuance of such one or more
particular series), given in person or by proxy, by vote at a meeting called for
that purpose.

                  So long as shares of a particular series of Preferred Stock
are outstanding, the corporation shall not amend, alter or repeal any provision
of the Directors' Resolution providing for the issuance of such series so as to
affect adversely the rights, powers or preferences of the shares of such series
or of the holders thereof, without the consent of the holders of at least
two-thirds (2/3) of the number of outstanding shares of said series, given in
person or by proxy, by vote at a meeting called for that purpose.

                  In the event of any liquidation, dissolution or winding up of
the corporation, then, before any distribution or payment shall be made to the
holder of any junior stock, the holders of the Preferred Stock of each series
shall be entitled to be paid, in the event of a voluntary or involuntary
liquidation, dissolution or winding up, such preferential amounts as may be
fixed for such series in the Directors' Resolution providing for the issuance
thereof. After such payment shall have been made in full to the holders of the
Preferred Stock, the remaining assets and funds of the corporation shall be
distributed among the holders of junior stock according to their respective
rights. In the event that the assets of the corporation available for
distribution to holders of Preferred Stock shall not be sufficient



                                      -9-


to make the payments herein required to be made in full, such assets shall be
distributed to the holders of the respective shares of Preferred Stock in
accordance with such priorities, if any, as between the various series of
Preferred Stock as may be specified in any Directors' Resolution.

                  Preferred Stock redeemed or otherwise retired by the
corporation assumes the status of authorized but unissued Preferred Stock and
may thereafter, subject to the provisions of any Directors' Resolution providing
for the issue of any particular series of Preferred Stock, be reissued in the
same manner as authorized but unissued Preferred Stock.

         B. Common Stock.

                  1. Dividends. Subject to the prior rights and preferences of
the Preferred Stock, and subject to the provisions and on the conditions set
forth in the foregoing paragraph A of this Article IV, or in any Directors'
Resolution providing for the issue of a series of Preferred Stock, such
dividends (payable in cash, stock or otherwise) as may be determined by the
Board of Directors may be declared and paid on the Common Stock from time to
time out of any funds legally available therefor.

                  2. Voting. Except as otherwise required by law, each share of
Common Stock shall have one vote, in person or by proxy, for each share thereof
held, and all shares of the corporation, including shares of Preferred Stock
shall be voted as a single class except where specifically required by law to
vote separately.



                                      -10-


                  3. Distribution. After payment shall have been made in full to
the holders of the Preferred Stock in the event of any liquidation, dissolution
or winding up of the affairs of the corporation, the remaining assets and funds
of the corporation shall be distributed among the holders of the Common Stock
according to their respective shares.

         C. Pre-emptive Rights. No holder of any stock of the corporation shall
be entitled as a matter of right to purchase or subscribe for any part of any
stock of the corporation, authorized by this Article IV, or of any additional
stock of any class to be issued by reason of any increase of the authorized
stock of the corporation, or of any bonds, certificates of indebtedness,
debentures or other securities convertible into stock of the corporation, but
any stock authorized by this Article IV or any such additional authorized issue
of new stock or of securities convertible into stock may be issued and disposed
of by the Board of Directors to such persons, firms, corporations or
associations for such consideration and upon such terms and in such manner as
the Board of Directors may in their discretion determine without offering any
thereof on the same terms or on any terms to the stockholders then of record or
to any class of stockholders.

         D. Miscellaneous. The corporation shall be entitled to treat the person
in whose name any share, right or option is registered as the owner thereof for
all purposes and shall not be bound to recognize any equitable or other claim to
or interest in such share, right or option on the part of any other person,



                                      -11-


whether or not the corporation shall have notice thereof, save as may be
expressly provided by the laws of the State of Delaware.

         A Director shall be fully protected in relying in good faith upon the
books of account of the corporation or statements prepared by any of its
officials as to the value and amount of the assets, liabilities and/or net
profits of the corporation, or any other facts pertinent to the existence and
amount of surplus or other funds from which dividends might properly be declared
and paid.

         Without action by the stockholders, the shares of stock may be issued
by the corporation from time to time for such consideration (not less than the
par value thereof if such stock has a par value) as may be fixed from time to
time by the Board of Directors, and any and all such shares so issued, the full
consideration for which has been paid or delivered, shall be deemed fully paid
stock and not liable to any further call or assessment thereon, and the holder
of such shares shall not be liable for any further call or assessment thereon,
or for any other payment thereof.

                                   ARTICLE V.

                               Sole Incorporator

         The name and mailing address of the sole incorporator is:

                           J. J. French, Jr.
                           3600 RepublicBank Dallas Tower
                           Dallas, Texas 75201-3989



                                      -12-


                                   ARTICLE VI.

                                    Directors

         The number of Directors constituting the initial Board of Directors is
seven (7); however, hereafter the Bylaws of the corporation shall fix the number
at not less than five (5), nor more than twelve (12). The name and mailing
address of each initial Director who is to serve as a Director until the first
annual meeting of the stockholders or until a successor is elected and qualified
are as follows:

<Table>
<Caption>
          Name                                    Address
          ----                                    -------
                                     

W. Ray Wallace                          P.O. Box 10587
                                        Dallas, Texas 75207

Alfred J. Gamble                        P.O. Box 310
                                        Montgomery, Alabama 36195-2201

Dean P. Guerin                          2001 Bryan Tower, 23rd floor
                                        Dallas, Texas 75201

Jess T. Hay                             2001 Bryan Tower, Suite 3600
                                        Dallas, Texas 75201

Edmund M. Hoffman                       1999 Bryan Street, Suite 3300
                                        Dallas, Texas 75201

Ray J. Pulley                           P.O. Box 576
                                        Brownsboro, Texas 75756

Thomas A. Rose, Jr.                     403 South Akard
                                        Dallas, Texas 75202
</Table>

                                  ARTICLE VII.

                                    Duration

         The corporation is to have perpetual existence.



                                      -13-


                                  ARTICLE VIII.

                        Powers of the Board of Directors

         In furtherance and not in limitation of the powers conferred by the
laws of the State of Delaware, the Board of Directors of the corporation is
expressly authorized:

         1. To make, alter, amend and repeal the Bylaws;

         2. To set apart out of any of the funds of the corporation available
for dividends a reserve or reserves for any proper purpose and to alter or
abolish any such reserve;

         3. To authorize and cause to be executed mortgages and liens upon the
property and franchises of the corporation; and

         4. To designate, by resolution passed by a majority of the whole Board,
three or more directors to constitute an Executive Committee, which committee,
unless its authority shall be otherwise expressly limited by such resolution,
shall have and may exercise all of the authority of the Board of Directors in
the business and affairs of the corporation except where action of the Board of
Directors is specified by statute or other applicable law; provided, the
designation of such committee and the delegation thereto of authority shall not
operate to relieve the Board of Directors, or any member thereof, of any
responsibility imposed upon it or him by law.

         To the extent that any of the foregoing powers conflict with any
applicable statute of the State of Delaware now or hereafter in effect, such
statute, to the extent of such conflict, shall be controlling.



                                      -14-


                                   ARTICLE IX.

                                   Amendments

         The corporation reserves the right to amend, alter, change or repeal
any provision contained in this Certificate of Incorporation, in the manner now
or hereafter prescribed by law, and all rights conferred upon officers,
directors, and stockholders herein are granted subject to this reservation.

                                   ARTICLE X.

                    Compromise or Arrangement with Creditors

         Whenever a compromise or arrangement is proposed between the
corporation and its creditors or any class of them and/or between the
corporation and its stockholders or any class of them, any court of equitable
jurisdiction within the State of Delaware may, on the application in a summary
way of the corporation or of any creditor or stockholder thereof or on the
application of any receiver or receivers appointed for the corporation under the
provisions of section 291 of Title 8 of the Delaware Code or on the application
of trustees in dissolution or of any receiver or receivers appointed for the
corporation under the provisions of section 279 of Title 8 of the Delaware Code
order a meeting of the creditors or class of creditors, and/or of the
stockholders or class of stockholders of the corporation, as the case may be, to
be summoned in such manner as the said court directs. If a majority in number
representing three-fourths in value of the creditors or class of creditors,
and/or of the stockholders or



                                      -15-


class of stockholders of the corporation, as the case may be, agree to any
compromise or arrangement and to any reorganization of this corporation as
consequence of such compromise or arrangement, the said compromise or
arrangement and the said reorganization shall, if sanctioned by the court to
which the said application has been made, be binding on all the creditors or
class of creditors, and/or on all the stockholders or class of stockholders, of
the corporation, as the case may be, and also on the corporation.

         THE UNDERSIGNED, being the sole incorporator hereinbefore named, for
the purpose of forming a corporation pursuant to the General Corporation Law of
the State of Delaware, does make this Certificate, hereby declaring and
certifying that this is my act and deed and the facts herein stated are true,
and accordingly I have hereunto set my hand this 1st day of August, 1986.


                                                /s/ J. J. FRENCH, JR.
                                                --------------------------------
                                                J. J. French, Jr.





                                      -16-


THE STATE OF TEXAS      )
                        )
COUNTY OF DALLAS        )

         BEFORE ME, the undersigned authority, on this day personally appeared
J. J. French, Jr., known to me to be the person whose name is subscribed to the
foregoing instrument, and being by me first duly sworn, declared to me that the
statements therein contained are true and correct and that he executed the same
as his act and deed for purposes and consideration therein expressed.

         GIVEN UNDER MY HAND AND SEAL OF OFFICE this the 1st day of August,
1986.


                                                         /s/ KELLY SMITH
                                                --------------------------------
                                                     Notary Public in and for
                                                        The State of Texas

[SEAL]

My Commission Expires:

        1-24-89                                            KELLY SMITH
- ---------------------------                     --------------------------------
                                                      Printed Name of Notary


                                      -17-

                                                                          PAGE 1



                               STATE OF DELAWARE

                        OFFICE OF THE SECRETARY OF STATE

                        --------------------------------



     I, EDWARD J. FREEL, SECRETARY OF STATE OF THE STATE OF DELAWARE, DO HEREBY
CERTIFY THE ATTACHED IS A TRUE AND CORRECT COPY OF THE CERTIFICATE OF
INCORPORATION OF "TRINITY INDUSTRIES, INC.", FILED IN THIS OFFICE ON THE FOURTH
DAY OF AUGUST, A.D. 1986, AT 3 O'CLOCK P.M.











                                                     /S/ EDWARD J. FREEL
                                     [SEAL]  -----------------------------------
                                             Edward J. Freel, Secretary of State


2098029 8100                                           AUTHENTICATION:   0779753

001549195                                                        DATE:  11-08-00