EXHIBIT 10.1


                       FIRST AMENDMENT TO CREDIT AGREEMENT

      THIS AMENDMENT amends that certain Credit Agreement dated as of May 15,
1997 (the "AGREEMENT"), by and between Transport Corporation of America, Inc., a
Minnesota corporation ("BORROWER") and Firstar Bank of Minnesota, National
Association (the "BANK"). All capitalized terms not otherwise defined herein
shall have the meanings set forth in the Agreement.

1.    DEFINITIONS. The following definitions are hereby deleted and replaced
      with the following

            "ADJUSTED LIBOR RATE" shall mean, for any Interest Period and the
      applicable LIBOR Rate Advance, the per annum rate of interest equal to the
      sum of (a) one hundred twenty-five basis points (1.25%), plus (b) the per
      annum rate (rounded up, if necessary, to the nearest one-sixteenth of one
      percent (1/16%)) determined by dividing (i) the LIBOR Rate for such LIBOR
      Rate Advance and related Interest Period, by (ii) an amount equal to one
      minus the stated maximum rate (expressed as a decimal) of all reserve
      requirements (including any basic, marginal, emergency, supplemental,
      special or other reserves) that is specified from time to time during an
      Interest Period by the Board of Governors of the Federal Reserve System
      (or any successor agency) for funding "Eurocurrency Liabilities" pursuant
      to Regulation D of such Board or any other then applicable successor
      regulation, without benefit of credit or prorations, exemptions or offsets
      which might otherwise be available to the Bank from time to time under
      Regulation D.

            "BORROWING BASE" shall mean an amount equal to the sum of (a)
      eighty-five percent (85%) of all Eligible Accounts, plus (b) seventy-five
      percent (75%) of the net book value of Eligible Equipment, each as
      determined as of the last day of the most recent calendar month and at
      such other times as may be required by the Bank.

            "BORROWING BASE CERTIFICATE" shall mean the certificate in the form
      of Exhibit A to this First Amendment, or such other form prescribed by the
      Lender from time-to-time pursuant to Section 6.18 of the Credit Agreement.

            "ELIGIBLE EQUIPMENT" shall mean all certificated tractors and
      trailers owned by the Borrower as equipment and used for transport in the
      ordinary course of the Borrower's business and listed on Schedule B to the
      Security Agreement or any schedule of pledged equipment delivered by the
      Borrower to the Bank pursuant to Section 6.18(h) of the Credit Agreement,
      provided such trucks and trailers:

            (a)   (i) are subject to a perfected, first priority security
                  interest in favor of the Bank in accordance with all
                  applicable state titling statutes and are free and clear of
                  all other Liens, or (ii) between the Closing Date (as defined
                  in the North Star Acquisition Agreement) and August 31, 1998,
                  are subject to a negative pledge granted in accordance to
                  Section 5 of the First Amendment to Credit Agreement;

            (b)   are in good condition free from any defects that would
                  negatively affect the market value thereof in a material way;




            (c)   are not, as reasonably determined by the Bank, unusable in the
                  ordinary course of Borrower's business; and

            (d)   are insured against loss or damage in accordance with the
                  provisions of the Security Agreement.

            "NORTH STAR ACQUISITION AGREEMENT" shall mean that certain Stock
      Purchase Agreement By and Among Transport Corporation of America, Inc.,
      North Star Transport, Inc. and The Shareholders of North Star Transport,
      Inc. dated as of May 20, 1998, a true copy of which has been delivered to
      the Bank.

            "REVOLVING NOTE" shall mean the Revolving Credit Note dated May 15,
      1998, made payable by the Borrower to the order of the Bank in the
      original principal amount of $25,000,000.

            "TERMINATION DATE" shall mean the earlier of August 31, 1998 or the
      date on which an Event of Default has occurred and the Bank determines to
      extinguish its commitment hereunder.

2.    REVOLVING LOAN. Article III of the Loan Agreement is hereby deleted in its
      entirety and replaced with the following:

                          "ARTICLE III. REVOLVING LOAN

3.1   NATURE OF LOAN COMMITMENT/MAXIMUM OF ADVANCES. Subject to the terms and
      conditions of this Agreement, the Bank shall make Advances to the Borrower
      from time to time from the date hereof to the Termination Date in an
      aggregate principal amount not to exceed at any time the lesser of (i)
      Twenty-Five Million Dollars ($25,000,000) less the sum of (a) the L/C
      Amount and (b) the Obligation of Reimbursement or (ii) the Borrowing Base
      less the sum of (a) the L/C Amount and (b) the Obligation of Reimbursement
      (the "Revolving Credit Commitment"). All Advances pursuant to the
      Revolving Credit Commitment, including Advances made by the Bank pursuant
      to Section 2.1 for Borrower's Obligation of Reimbursement, shall be
      evidenced by the Revolving Note; provided that the Borrower shall be
      obligated to pay only the amount that is actually disbursed hereunder,
      together with accrued interest on the outstanding balance at the rates
      provided in Section 3.4 hereof. The Borrower may borrow, prepay and
      reborrow within such limit pursuant to this Agreement and the Revolving
      Note.

3.2   TYPES OF ADVANCES; CERTAIN LIMITATIONS. Each Advance by the Bank under the
      Revolving Credit Commitment may be either a LIBOR Rate Advance or a Prime
      Rate Floating Advance. LIBOR Rate Advances and Prime Rate Floating Rate
      Advances may be outstanding at the same time; provided, however, that no
      more than eight (8) LIBOR Rate Advances may be outstanding at any one
      time. The principal amount of each LIBOR Rate Advance shall be not less
      than $100,000 or an integral multiple thereof.

3.3   PURPOSE FOR ADVANCES. Except with the prior written consent of the Bank,
      all Advances under Article III shall be used exclusively for the
      Borrower's working capital and other general business purposes; provided
      that up to $15,800,000 of Advances 




      under Article III may be used for acquisition financing for the purpose of
      acquiring North Star Transport.

3.4   COMPUTATION OF INTEREST. The Advances under the Revolving Credit
      Commitment shall bear interest on the unpaid principal amount thereof as
      follows:

      (i)   For LIBOR Rate Advances, at a fluctuating rate per annum equal to
            the Adjusted LIBOR Rate, and

      (ii)  For Floating Rate Advances, at a fluctuating rate per annum equal to
            the Prime Rate Floating Rate less one hundred forty basis points
            (1.40%) per annum.

            All interest payable on Advances shall be computed on the basis of
      actual days elapsed and a year of 360 days. Interest shall be payable
      monthly in arrears on the last business day of each month commencing on
      June 30, 1998, and at maturity.

3.5   MATURITY. The Revolving Note shall be expressed to mature on the earlier
      of: (i) August 31, 1998 or (ii) upon the occurrence of an Event of
      Default. All amounts outstanding under the Revolving Note shall be
      immediately due and payable at maturity (whether by acceleration or
      otherwise).

3.6   RECORDKEEPING. Bank shall record in its records, the date and amount of
      each Advance made thereon by Bank, and each repayment thereof. The
      aggregate unpaid principal amount so recorded shall be presumptive
      evidence of the principal amount of the Advances owing and unpaid by the
      Borrower thereon. The failure to so record any such amount or any error in
      so recording any such amount shall not, however, limit or otherwise affect
      the Obligations of the Borrower hereunder or under the Revolving Note to
      repay the principal amount of the Advances together with all interest
      accrued thereon.

3.7   NON-USE FEES. The Borrower agrees to pay the Bank, not later than ten (10)
      days after receipt of a statement therefor, a fee equal to one-quarter of
      one percent (1/4 %) per annum times the average daily unused portion of
      the Revolving Credit Commitment, payable quarterly in arrears commencing
      July 1, 1998, and as of the maturity date of the Revolving Note."

3.8   Section 5.6(b) is hereby deleted in its entirety and replaced with the
      following:

      "CONVERSION OF LIBOR RATE ADVANCES TO FLOATING RATE ADVANCES.
      Notwithstanding Section 5.6(a), if such Section would otherwise be
      applicable but the Bank could lawfully maintain the LIBOR Rate Advances at
      the Prime Rate less 1.40% per annum then, during such period as the Bank
      cannot maintain the LIBOR Rate Advances at the Adjusted LIBOR Rate, the
      LIBOR Rate Advances shall bear interest at a per rate equal to Prime Rate
      less 1.40% per annum in effect from time to time. If the Bank determines
      that all events or conditions making it unlawful or impossible for the
      Bank to maintain the LIBOR Rate Advances at the Adjusted LIBOR Rate cease
      to exist, then Advances may again bear interest at the Adjusted LIBOR
      Rate, subject to the other terms and conditions of this Agreement."




4.    MANDATORY PREPAYMENT. Section 5.1 is deleted in its entirety and replaced
      with the following:

      "If at any time the outstanding Obligations of the Borrower exceeds the
Revolving Credit Commitment, the Borrower shall immediately repay the excess."

5.    NEGATIVE PLEDGE OF EQUIPMENT. The Borrower agrees that it shall not create
      or permit to exist any security interest on any of its trucks and trailers
      that have not previously been pledged to any other party, whether now
      owned or hereafter acquired. Simultaneously with the execution of this
      Amendment, the Borrower shall deliver to the Lender a schedule of such
      previously unpledged trucks and trailers, setting forth the net
      depreciated book value of each such truck or trailer, certified as correct
      by the Borrower's chief financial officer. Borrower agrees that, at the
      request of the Lender, it shall promptly deliver certificates of title and
      completed applications for notation of the Lender's lien for each such
      truck and trailer.

6.    PRECONDITIONS TO EFFECTIVENESS. This Amendment shall only become effective
      upon (a) the execution of the Amendment and the Revolving Credit Note by
      the Borrower and the Bank, and (b) execution and delivery by the Borrower
      of (i) the items described in Paragraph 3 above; (ii) a current Borrowing
      Base Certificate; (iii) an opinion of Borrower's counsel satisfactory to
      the Lender's counsel; and (iv) any and all additional related documents
      referred to in this Amendment or as otherwise may be required by the
      Lender.

7.    CONSENT AND ACKNOWLEDGMENT OF CORPORATE GUARANTORS. By executing the
      acknowledgment below, TCA of Ohio, Inc. and Transport International
      Express, Inc. (each a "Corporate Guarantor@ and collectively, the
      "Corporate Guarantors@) each hereby (a) consents to each and all of the
      provisions of this Amendment, and (b) acknowledges and agrees that the
      Guaranty executed by it and delivered to the Lender remains in full force
      and effect in accordance with its original terms, not subject to any
      defense, counterclaim or right of setoff.

8.    REPRESENTATIONS REAFFIRMED. The Borrower and each Corporate Guarantor
      hereby warrants and represents to the Lender that (a) each and all of the
      representations and warranties set forth and contained in the Loan
      Agreement and the other Loan Documents are true, correct and complete in
      all respects as of the date hereof, and (b) no Default or Event of Default
      has occurred and is continuing as of the date hereof.

9.    NO WAIVERS. The Borrower and each Corporate Guarantor hereby acknowledges
      and agrees that by executing and delivering this Agreement to the Lender
      it is not waiving any existing Defaults or Event of Default, whether known
      or unknown, nor is the Lender waiving any of its rights or remedies under
      the Loan Agreement or any of the Loan Documents, provided, however that
      the Bank does consent to Borrower entering into and consummating the
      transaction contemplated by the North Star Acquisition Agreement in
      accordance with the terms thereof, and the Bank hereby waives any Event of
      Default under Section 6.23 of the Agreement for doing so.

10.   NO SET-OFF. The Borrower and each Corporate Guarantor acknowledges to and
      agrees with the Lender that no events, conditions or circumstances have
      arisen or exist as of the date hereof which would give the Borrower the
      right to assert a defense, counterclaim and/or setoff to any claim by the
      Lender for payment of the Obligations, and if any so exist as of the date
      hereof, whether know or unknown, absolute or contingent, liquidated or
      unliquidated, the same are hereby waived.




11.   RELEASE. The Borrower and each Corporate Guarantor hereby releases the
      Lender and each of its officers, directors, agents, employees, legal
      counsel and other representatives from any and all claims, demands, causes
      of action, liability, damage, loss, cost and expense arising from and/or
      which it has paid, incurred or sustained or believe it has paid, incurred
      or sustained, known or unknown, absolute or contingent, liquidated or
      unliquidated, as a result of or related to (a) the transactions evidenced
      by or related to the Loan Documents and any and all other documents,
      agreements or instruments related thereto, or (b) any acts or omissions of
      the Lender or any of its officers, directors, agents, employees, legal
      counsel or other representatives in connection therewith or related
      thereto, or (c) the extension or denial of credit.

12.   MERGER. All prior oral and written communications, commitments, alleged
      commitments, promises, alleged promises, agreements and alleged agreements
      by or between the Lender and the Borrower are hereby merged into this
      Agreement and the Loan Documents, and shall not be enforceable unless
      expressly set forth in this Agreement and the Loan Documents.

13.   NO OTHER AMENDMENTS. Except as expressly amended hereby or as previously
      amended in writing, each of the Loan Agreement and the other Loan
      Documents shall remain in full force and effect in accordance with their
      original terms.

14.   LEGAL EXPENSES. The Borrower shall pay and will reimburse the Bank on
      demand for all reasonable out-of-pocket expenses incurred by the Bank
      relating to this Amendment, including without limitation reasonable
      attorneys' fees and legal expenses incurred for the preparation of this
      Amendment.

15.   COUNTERPARTS. This Amendment may be signed in any number of counterparts,
      each of which shall be considered as an original, but when taken together
      shall constitute one document.

16.   AUTHORIZATION. The Borrower and each Corporate Guarantor represents and
      warrants that the execution, delivery and performance of this Amendment
      and the documents referenced herein are within the corporate powers of the
      Borrower and have been duly authorized by all necessary corporate action.

      IN WITNESS WHEREOF, the parties have executed this Amendment as of this
_____ day of ________, 1998.

                                                      FIRSTAR BANK OF MINNESOTA,
                                                                        NATIONAL
                                                                     ASSOCIATION

                                          By: 
                                             -----------------------------------
                                             Its:
                                                 -------------------------------


                                          TRANSPORT CORPORATION OF AMERICA,
                                           INC.

                                          By: 
                                             -----------------------------------
                                             Its:
                                                 -------------------------------




                     ACKNOWLEDGMENT OF CORPORATE GUARANTORS:



TCA OF OHIO, INC.                         TRANSPORT INTERNATIONAL EXPRESS, INC.


By:                                       By:                                   
   -----------------------------------       -----------------------------------
   Its:                                      Its:                               
       -------------------------------           -------------------------------




                                    EXHIBIT A

                           BORROWING BASE CERTIFICATE


TO:   Firstar Bank of Minnesota, National Association (the "Bank")

      Pursuant to the Credit Agreement between Transport Corporation of America,
Inc. ("Borrower") and the Bank ("Credit Agreement") dated May 15, 1997, as
amended, the undersigned hereby certifies and warrants that as of _________,
19___, the Borrower Base was as follows:

                            RECEIVABLES AND EQUIPMENT



Total Accounts                          $_________________

Less: Ineligible Accounts              ($_________________)

Eligible Accounts                       $_________________

Times 85% = Borrowing Base Amount                            $_________________

Eligible Equipment (net book value)     $_________________

Times 75% = Borrowing Base Amount                            $_________________

Total Borrowing Base                                         $_________________

Revolving Loans                         $_________________

Undrawn Letters of Credit               $_________________

Total Loans & Letters of Credit                              $_________________

Margin or (Deficiency)                                       $_________________


      The person signing this Borrowing Base Certificate on behalf of the
Borrower represents that he or she or it is authorized to do so by such party
and that it is true and correct to the best of his or her knowledge.

      This Borrowing Base Certificate is subject to, and does not modify or in
any way affect the terms and conditions of the Credit Agreement. The terms and
conditions of the Credit Agreement shall supersede and control any inconsistent
terms or conditions of the Borrowing Base Certificate.

                                          Transport Corporation of America, Inc.


Date _____________, 19____               --------------------------------------
                                                  Authorized Signature and Title