Document:

<PAGE>   1
                                                                    EXHIBIT 10.6

                              CONSULTING AGREEMENT

         THIS CONSULTING AGREEMENT ("Agreement") is made and entered into as of
June 1, 2000 by and between MILLER WELBORN, an individual resident of Alabama
(hereinafter referred to as "Consultant"), and BOYD BROS. TRANSPORTATION INC., a
Delaware corporation (hereinafter referred to as the "Company").

                              W I T N E S S E T H:

         WHEREAS, Consultant has heretofore been employed by the Company as Vice
Chairman, and prior thereto was employed by the Company as President and Chief
Executive Officer;

         WHEREAS, Consultant has resigned from his employment with the Company;

         WHEREAS, the Company desires for Consultant to provide certain
consulting services for the Company and to agree to certain restrictions
concerning confidential information as set forth herein and to make certain
payments to Consultant in consideration therefor;

         NOW, THEREFORE, in consideration of the premises and mutual promises
herein contained, it is agreed as follows:

1.       TERMINATION OF EMPLOYMENT AGREEMENT; CONSULTING.

         1.1 Consultant and the Company hereby covenant and agree that the
employment relationship between Consultant and the Company more particularly
described in that certain Employment Agreement between the parties hereto, dated
December 8, 1997, as amended by that certain First Amendment to Acquisition
Agreement, Employment Agreement and Covenant Not to Compete, dated as of March
17, 2000 (the "Employment Agreement"), shall be terminated as of the end of
business on May 31, 2000; provided, however, that those provisions of the
Employment Agreement that by their terms survive any termination or expiration
of the Employment Agreement shall continue in full force and effect thereafter.
Notwithstanding Section 7(a) of the Employment Agreement, the termination of
Consultant's employment with the Company shall not constitute Consultant's
resignation from the Company's Board of Directors.

         1.2 The Company hereby engages the Consultant to perform and the
Consultant hereby agrees to perform the consulting services in Section 1.3 below
to commence June 1, 2000 and terminate on November 30, 2001 (the "Term").
Consultant shall make himself available to perform consulting services for the
Company for up to Ten working days per month, on

<PAGE>   2

such days, at such times, and in such locations as the Chief Executive Officer
of the Company shall reasonably request.

         1.3 The consulting services to be performed by Consultant shall include
advice on [marketing, sales, owner/operator issues, driver recruitment and
retention] and such other consulting services as may be agreed upon from time to
time by Consultant and the Company ("Consulting Services"). Consultant shall
report to the Chief Executive Officer of the Company only, or to the Chief
Executive Officer's designee, or to the Chief Executive Officer of Welborn
Transport, Inc., a wholly owned subsidiary of the Company.

         1.4 It is the intention of the parties that Consultant be an
independent contractor and not an employee, agent, joint venturer, or partner of
the Company. Nothing in this Agreement shall be interpreted or construed as
creating or establishing the relationship of employer and employee between the
Company and Consultant. Consultant shall not incur any liability or obligation
on the part of the Company without the prior written consent of the Company or
represent to any third party that Consultant has the authority to incur any
obligation on behalf of the Company.

2.       COMPENSATION.

         2.1 In consideration for the Consulting Services to be performed by
Consultant described in Section 1.3 hereof and Consultant's undertakings
concerning Confidential Information set forth in Section 3 hereof, the Company
shall pay Consultant a consultant fee of $6,250 per month (the "Consulting Fee")
through and including November 30, 2001 or the earlier termination of this
Agreement.

         2.2 The Company and Consultant acknowledge and agree that Consultant is
not the Company's employee, and the Company therefore shall not take any action
or provide Consultant with any benefits or commitments inconsistent with any of
such undertakings by Consultant. Accordingly, Consultant shall pay and report
federal and state income tax withholding, workers' compensation, social security
taxes, and unemployment insurance applicable to Consultant. Consultant shall
bear sole responsibility for any health or disability insurance, retirement
benefits, or other welfare or pension benefits, if any, of Consultant.
Consultant agrees to defend, indemnify, and hold harmless the Company, its
officers, directors, employees and agents, and the administrators of the
Company's benefit plans, from and against any claims, liabilities, or expenses
relating to such compensation, tax, insurance, or benefit matters, provided that
the Company shall notify Consultant of each such claim and cooperate with
Consultant in the defense and resolution of such claim.

         2.3 Consultant shall be entitled to reimbursement of all reasonable
expenses incurred in performance of his duties hereunder, including without
limitation, reimbursement of mileage expenses when on business of the Company.

         2.4 In the event of Consultant's death or disability, the payments
contemplated in Section 2.1 shall be paid to his estate or to Consultant, as the
case may be, in accordance with the terms thereof regardless of the provisions
of Section 1 hereof.

                                       2
<PAGE>   3

3.       CONFIDENTIAL INFORMATION.

         3.1 Subject to the provisions of Subsection 3.3 hereof, Consultant
shall keep confidential and not directly or indirectly disclose or divulge to
any person nor use or otherwise appropriate for Consultant's own benefit,
pricing information, marketing information, recruitment and employment
information, sales techniques of the Company or any other of the following
confidential information or documents of or relating to the Company:
confidential records, client and customer lists, information about client
requirements, terms of contracts with clients and customers, and planning and
financial information of the Company (hereinafter collectively referred to as
the "Confidential Information"). Consultant hereby acknowledges and agrees that
the prohibitions against disclosure of Confidential Information recited herein
are in addition to, and not in lieu of, any rights or remedies which the Company
may have available pursuant to the laws of any jurisdiction or at common law to
prevent the disclosure of trade secrets or proprietary information, and the
enforcement by the Company of its rights and remedies pursuant to this Agreement
shall not be construed as a waiver of any other rights or available remedies
which it may possess in law or equity absent this Agreement.

         3.2 Consultant shall not utilize the Confidential Information for any
purpose except the purpose for which the Confidential Information is being
disclosed to the Consultant.

         3.3 The obligation of nondisclosure and nonuse set forth in this
Section 3 shall expire two (2) years after the last date on which the Consultant
performs consulting services hereunder and shall not apply to any Confidential
Information that was: (a) in the public domain at the time it was disclosed to
the Consultant or subsequently came into the public domain through no fault of
the Consultant; (b) rightfully known by the Consultant prior to its disclosure
to him or independently developed by the Consultant outside of his employment or
consulting engagement with the Company; or (c) received by the Consultant as a
matter of right from a source other than the Company or another person subject
to a confidentiality obligation to the Company.

4.       DISCLOSURE UNDER LEGAL COMPULSION.

         In the event that Consultant or any of Consultant's representatives
become legally compelled (by deposition, interrogatory, request for documents,
subpoena, civil investigative demand, any similar process or otherwise) to
disclose any of the Confidential Information, Consultant shall provide the
Company with prompt prior written notice of such requirement so that the Company
may seek a protective order or other appropriate remedy and/or waive compliance
with the terms of this Agreement. In the event that such protective order or
other remedy is not obtained, or that the Company waives compliance with the
provisions hereof, Consultant agrees to furnish only that portion of the
Confidential Information which is required to be disclosed in the written
opinion of Consultant's counsel, and to use reasonable efforts to obtain
confidential treatment of such of the disclosed information which the Company so
designates.

                                       3
<PAGE>   4

5.       CONTINUATION OF NONCOMPETITION COVENANTS.

         Consultant acknowledges and agrees that the terms, conditions,
restrictions and requirements of (i) that certain Covenant Not To Compete by and
between the Consultant, W.T. Acquisition Company and the Company, dated December
8, 1998, as amended by that certain First Amendment to Acquisition Agreement,
Employment Agreement and Covenant Not to Compete, dated as of March 17, 2000,
and (ii) Sections 8, 9, 10, 11, 12, 13, 14 and 15 of the Employment Agreement,
shall continue in full force and effect and shall not be amended, terminated or
otherwise modified by this Agreement in any way.

6.       INJUNCTION.

         6.1 It is the understanding of the parties that the obligations of the
Consultant set forth in Section 3 of this Agreement relating to Confidential
Information will be enforced to the fullest extent permissible under the laws
and public policies in any jurisdiction in which enforcement is sought, and
shall survive the termination of this Agreement and/or Consultant's engagement
with the Company.

         6.2 If there is a breach or threatened breach of any provision of this
Agreement, the Company shall be entitled to seek and obtain an injunction
restraining the Consultant from such breach. Nothing contained in this Agreement
shall be construed as prohibiting the Company from pursuing any other remedies
for such breach or threatened breach.

         6.3 If any court shall determine that the duration, geographical limit
or any other aspect of any restriction contained in this Agreement is
unenforceable, it is the intention of the parties that any restrictive covenants
set forth herein shall not thereby be terminated, but shall be deemed amended to
the extent required to render them valid and enforceable.

         6.4 The Consultant acknowledges and agrees that the prohibition against
disclosure of Confidential Information recited in Section 3 hereof is in
addition to, and not in lieu of, any rights or remedies which the Company may
have available pursuant to the laws of any jurisdiction or at common law to
prevent the disclosure of trade secrets and that the enforcement by the Company
of its rights and remedies pursuant to this Agreement shall not be construed as
a waiver of any other rights or remedies which it may possess in law or at
equity absent this Agreement.

7.       TERMINATION.

         7.1 Either party may terminate this Agreement in the event of a
material breach by the other party of any obligation provided herein. Any such
termination may be made only by written notice to the other party, specifically
identifying the breach or breaches on which termination is based. Following
receipt of such notice, the party in breach shall have fifteen (15) days to cure
such breach or breaches, and this Agreement shall terminate in the event that
such cure is not made by the end of such period.

                                       4
<PAGE>   5

         7.2 Upon the termination of this Agreement, Consultant shall promptly
return to the Company all materials furnished by the Company to Consultant
during the term of this Agreement, without regard to whether such materials
contain proprietary or confidential information of the Company and all materials
containing any proprietary information or Confidential Information of the
Company.

         7.3 In the event of any termination of this Agreement, Sections 2.3, 3,
5 and 6 hereof shall survive and continue in full force and effect.

8.       SEVERABILITY.

         If any particular provision of this Agreement shall be adjudicated to
be invalid or unenforceable (subject to Subsection 6.3 above), such provision
shall be deemed amended to delete therefrom the portion adjudicated to be
invalid or unenforceable, such deletion to apply only with respect to the
operation of this Section in the particular jurisdiction in which such
adjudication is made.

9.       NOTICES.

         Any notice required or permitted to be given under this Agreement shall
be given in writing and sent by certified mail, postage prepaid, return receipt
requested, to the last known residence in the case of the Consultant or to the
Company's principal office in the case of the Company.

10.      AMENDMENT; NO WAIVER; ENTIRE AGREEMENT; SUCCESSORS AND ASSIGNS.

         This Agreement may not be changed orally, but only by an agreement in
writing, duly signed by the party against whom enforcement of any waiver,
change, modification, extension or discharge is sought. Any term or condition of
this Agreement may be waived at any time by the party hereto which is entitled
to the benefit thereof. A waiver on one occasion shall not be deemed to be a
waiver of the same or of any other breach on a future occasion. This Agreement
supersedes all prior discussions and agreements between Contractor and the
Company with respect to the matters herein contained, and, unless otherwise
expressly provided herein, this Agreement contains the sole and entire agreement
between the parties with respect to the transactions contemplated hereby. This
Agreement shall be binding upon and inure to the benefit of the parties hereto
and their respective successors or assigns, and, in the case of Consultant,
shall inure to the benefit of his heirs, legatees, executors, administrators and
guardians.

11.      GOVERNING LAW.

         This Agreement shall be governed by and construed in accordance with
the laws of the State of Alabama.

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<PAGE>   6

12.      BREACH OF AGREEMENT.

         Consultant agrees that in the event Consultant breaches any material
provisions of this Agreement, the Company shall be entitled, in addition to any
other remedies the Company may have under this Agreement, to offset to the
extent of any liability, loss, damage or injury from such breach any payments
due to Consultant pursuant to this or any other agreement to which Consultant
and the Company are parties, which notice of offset shall include an indication
of the reasons therefor.

13.      COUNTERPARTS AND HEADINGS.

         This Agreement may be executed simultaneously in any number of
counterparts, each of which shall be deemed an original and all of which shall
constitute one and the same instrument. The headings set out are for convenience
or reference and shall not be deemed a part of this Agreement.

         IN WITNESS WHEREOF, the parties have executed this Agreement and set
their hands and seals thereto as of the date first above written.

                                    "COMPANY":

                                    BOYD BROS. TRANSPORTATION INC.

                                    By: /s/ Richard Bailey
                                        ----------------------------------------
                                    Name: Richard Bailey
                                          --------------------------------------
                                    Title: Chief Financial Officer

                                    "CONSULTANT":

                                    /s/ Miller Welborn                    [SEAL]
                                    --------------------------------------
                                    MILLER WELBORN<PAGE>   1
                                                                    EXHIBIT 10.7

AMSOUTH(R) BANK

MASTER NOTE FOR BUSINESS AND COMMERCIAL LOANS         Montgomery, Alabama
$ 2,500,000.00                                        July 7, 2000
                                                      Date

     FOR VALUE RECEIVED, the undersigned (hereinafter called, whether one or
more, the "Borrower"), jointly and severally (if more than one) promises to pay
to the order of AmSouth Bank, its successors and assigns (hereinafter sometimes
called the "Bank" and sometimes, together with any other holder of this note,
called "Holder"), at any office of Holder or at such other place as Holder may
from time to time designate, the sum of ***Two Million Five Hundred Thousand and
00/100***Dollars ($ 2,500,000), or so much thereof as the Bank has advanced to
the Borrower hereunder (the "Loan"), plus interest from the date hereof until
maturity (whether by acceleration or otherwise) on the outstanding unpaid
principal balance of the Loan, at the rate of [check (1), (2), or (3)]:

     [ ] (1)________ % per annum.
     [ ] (2)________ % per annum in excess of the prime rate of the Bank in
         effect from time to time as designated by the Bank (the "Prime Rate"),
         with changes in the interest rate on this note caused by changes in the
         Prime Rate to take effect on the date the Prime Rate changes without
         notice to the Borrower or any action by Holder.
     [x] (3) See Exhibit "A" attached hereto and by this reference becomes a
         party hereto.

     Interest will be computed on the basis of the actual number of days elapsed
over (check one) [x] to the extent allowed by applicable law, an assumed 360-day
year, [ ] a 365 (or 366-, if leap year) day year.

     If none of the foregoing provisions for a rate of interest is checked, the
rate of interest payable on the Loan until maturity (whether by acceleration or
otherwise) shall be the Prime Rate of the Bank in effect from time to time, or
such lesser rate as shall be the maximum permitted by law, computed on the basis
of the actual number of days elapsed over an assumed 360-day year.

     Notwithstanding anything to the contrary contained in this note, the amount
paid or agreed to be paid as interest on the principal

     The Borrower hereby agrees to repay principal and interest as follows:

     The Borrower will pay the principal amount of the Loan (check one and
complete if applicable:)

     [ ] on demand, [x] 364 days after date, or
     [ ] _______________________________________________________________________
         ______________________________________________________________________,
         and will pay the interest on the Loan (check one and complete if
         applicable):
     [ ] at maturity, [x] in monthly installments on the 6th day of each
         month hereafter, and at maturity
     [ ] in quarterly installments on the _____ day of each __________, _______,
         _____________, and ______________________ hereafter and at maturity, or
     [ ] _______________________________________________________________________
         ______________________________________________________________________.

     For purposes of sending periodic billing statements in advance of each
interest payment date, at the Holder's option, the Prime Rate in effect 15 days
prior to each interest payment date shall be deemed to be the Prime Rate that
continues in effect until the date prior to such interest payment date for
purposes of computing the amount of interest payable on such interest payment
date. If the Prime Rate changes during such 15-day period, the difference
between the amount of interest that in fact accrues during such period and the
amount of interest actually paid will be added to or subtracted from, as the
case may be, the interest otherwise payable in preparing the periodic billing
statement for the next succeeding interest payment date. In determining the
amount of interest payable at the final maturity or upon full prepayment of
this Master Note, all changes in the Prime Rate occurring on or prior to the
day before the final maturity date or the date of such full prepayment shall be
taken into account.

     If none of the foregoing provisions for the repayment of principal and/or
interest is checked, the principal, if not checked, and interest, if not
checked, due hereunder shall be payable on demand of the Holder.

     For purposes of sending periodic billing statements in advance of each
interest payment date, at the Holder's option, the Prime Rate in effect 15 pays
prior to each interest payment date shall be deemed to be the Prime Rate that
continues in effect until the date prior to such interest payment date for
purposes of computing the amount of interest payable on such interest payment
date. If the Prime Rate changes during such 15-day period, the difference
between the amount of interest that in fact accrues during such period and the
amount of interest actually paid will be added to or subtracted from, as the
case may be, the interest otherwise payable in preparing the periodic billing
statement for the next succeeding interest payment date. In determining the
amount of interest payable at the final maturity or upon full prepayment of
this Master Note, all changes in the Prime Rate occurring on or prior to the
day before the final maturity date or the date of such full prepayment shall be
taken into account.

     If none of the foregoing provisions for the repayment of principal and/or
interest is checked, the principal, if not checked, and interest, if not
checked, due hereunder shall be payable on demand of the Holder.

     If permitted under applicable law, the Borrower agrees to pay to Holder, on
demand, a late charge. This late charge will be 5% of any installment that is
not paid within 12 days after it is due and will be 5% of the interest portion
of the payment due upon the final maturity date of this note if that payment is
not paid within 12 days after it is due. This late charge will never be less
than $10 nor more than $250 on each payment. This provision shall not be deemed
to excuse a late payment or be deemed a waiver of any other right Holder may
have, including, without limitation, the right to declare the entire unpaid
principal and interest immediately due and payable.

     All payments coming due on this Master Note shall be made in cash or
immediately available funds at the Holder's office at which the payment is made.
At its option, the Holder may elect to give the Borrower credit for any payment
made by check or other instrument in accordance with the Holder's availability
schedule in effect from time to time for such items and instruments, which the
Holder will make available to the Borrower on request. Each payment on the
indebtedness evidenced hereby will first reduce charges owed by the Borrower
that are neither principal nor interest. The remainder of each payment will be
applied first to accrued but unpaid interest and then to unpaid principal. Any
partial prepayments of principal will be applied to installments due in the
inverse order of their maturity and no such partial prepayment of principal will
have the effect of postponing, satisfying, reducing, or otherwise affecting any
scheduled installment before the principal of and interest on the Loan is, and
all other charges due hereunder are, paid in full.

     This note is a master note, and it is contemplated that the proceeds of the
Loan evidenced hereby will be advanced from time to time to the Borrower by
Holder in installments, as requested by the Borrower and agreed to by Holder. It
is further contemplated that any amounts advanced under this note may be prepaid
from time to time by the Borrower and subsequently re-advanced by Holder, so
long as the principal amount outstanding does not exceed the face amount of this
note. By reason of prepayments hereon there may be times when no indebtedness is
owing hereunder, and notwithstanding any such occurrence, this note shall remain
valid and shall be in full force and effect as to each subsequent principal
advance made hereunder. The Holder shall maintain a record (by computer or
otherwise) of all principal advances and repayments under this Master Note and
that record shall be presumed to be correct in the absence of clear and
convincing evidence to the contrary.

     Unless the Holder has otherwise agreed in writing, the Holder is not
obligated to make any advances or re-advances hereunder, and all advances and
re-advances shall be made at the option of Holder. This note shall be valid and
enforceable as to the aggregate amount advanced at any time hereunder, whether
or not the full face amount hereof is advance.

     If the Loan is payable on demand, this paragraph is inoperative and is not
applicable; otherwise, this paragraph is operative and applies to the Loan in
accordance with its terms. In the event of default in the payment of any one or
more installments of principal or interest which may become due hereunder, when
and as the same fall due, or in the payment of all of principal and interest due
hereunder at maturity, or the failure of any maker, endorser, surety or
guarantor hereof (hereinafter called the "Obligors") to pay when due or perform
any of the Obligations (meaning thereby this note and any and all renewals and
extensions thereof and all other liabilities and indebtedness of the Borrower to
Holder, now existing or hereafter incurred or arising, direct or indirect, and
however incurred) or any part thereof or the failure of any Obligor to pay when
due any other liability to Holder, in the event a default occurs under the terms
of any loan agreement or other instrument (other than this note), document or
paper evidencing, securing, guaranteeing, or executed in connection with all or
any part of the Obligations (hereinafter, together with this note, collectively
called the "Loan Documents"), or in the event Holder shall in good faith deem
itself insecure for any reason, or on the happening of any one or more of said
events, Holder shall have the right at its election and without notice to any
Obligor to declare the Obligations immediately due and payable with interest to
date. No delay in making such election shall be construed to waive the right to
make such election. Holder may note the fact of acceleration hereon without
stating the ground therefor and whether or not noted hereon such election to
accelerate shall be effective.

     In the event of death of, insolvency of, general assignment by, judgment
against, filing of a petition in bankruptcy by or against, filing a petition for
the reorganization of, filing of application in any court for receiver for, or
issuance of a writ of garnishment or attachment in a suit or action against any
Obligor or against any of the assets of any Obligor, or on the happening of any
one or more of said events, the Obligations shall, without notice to or demand
upon any Obligor, immediately become due and payable with interest to date
unless Holder shall on notice of such event elect to waive such acceleration by
written notation hereon.

     Each of the Obligors hereby severally (a) waives as to this debt or any
renewal or extension thereof all rights of exemption under the Constitution or
laws of Alabama or any other state as to personal property; (b) waives demand
(unless this note is payable on demand), presentment, protect, notice of
protest, notice of dishonor, suit against any party and all other waivable
requirements necessary to hold any Obligor liable; (c) agrees that time of
payment may be extended one or more times for any period of time (whether such
period is shorter or longer than the initial term of this note) or renewal notes
taken or other indulgence granted without notice of or consent to such action
and without release of liability as to any Obligor; (d) as to all or any part of
the Obligations, consents to Holder's releasing, agreeing not to sue, suspending
the right to enforce this instrument against or otherwise discharging or
compromising any Obligation of any Obligor or other person against whom any
Obligor has to the knowledge of Holder a right of recourse, all without notice
to or further reservations of rights against any Obligor, and all without in any
way affecting or releasing the liability of any Obligor; (e) consents to
Holder's releasing, exchanging or otherwise dealing in any manner with all or
any portion of any collateral, lien, or right of set-off which may now or
hereafter secure this note, all without notice to or further reservations of
rights against any Obligor, and all without in any way affecting or releasing
the liability of any Obligor, even though such release, exchange or other
dealing may in any manner and to any extent impair any such collateral, lien or
right of set-off; (f) agrees to pay all costs of collecting or securing or
attempting to collect or secure this note or defending any unsuccessful claim
asserted against the Holder in connection with this note, including reasonable
attorneys' fees; and (g) warrants that this Loan is for business, commercial or
agricultural purposes.

     In addition to all liens upon, and rights of set-off against, any monies,
securities, or other property of any of the Obligors given to Holder by law,
Holder shall have a lien upon and a right of set-off against all monies,
securities and other property of any of the Obligors now or hereafter in the
possession of, or on deposit with, Holder, whether held in a general or special
account or deposit, for safekeeping, or otherwise; and every such lien and right
of set-off may be exercised without demand upon or notice to any Obligor, and
the Bank shall have no liability with respect to any of Obligor's checks or
other items which may be returned or other funds transfers which may not be made
due to insufficient funds thereafter.

     The Borrower understands that the Bank may from time to time enter into a
participation agreement or agreements with one or more participants pursuant to
which such participant or participants shall be given participations in the Loan
and that such participants may from time to time similarly grant to other
participants sub-participations in the Loan. The Borrower agrees that any
participant may exercise any and all rights of banker's lien or set-off whether
arising by operation of law or given to Holder by the provisions of this note,
with respect to the Borrower as fully as if such participant had made the Loan
directly to the Borrower. For the purposes of this Paragraph only, the Borrower
shall be deemed to be directly obligated to each participant or subparticipant
in the amount of its participating interest in the principal of, and interest
on, the Loan.

     Neither any failure nor any delay on the part of Holder in exercising any
right, power or privilege under this note shall operate as a waiver thereof, nor
shall a single or partial exercise thereof preclude any other or further
exercise or the exercise of any other right power or privilege. No modification,
amendment or waive of any provisions of this note shall be effective unless in
writing and signed by a duly authorized officer of Holder, and then the same
shall be effective only in the specific instance and for the purpose for which
given. No notice to or demand on any Obligor in any case shall entitle Obligor
to any other or further notice or demand in the same, similar or other
circumstances.

     Any provision of this note which is prohibited or unenforceable in any
jurisdiction shall, as to such jurisdiction, be ineffective to the extent of
such prohibition or unenforceability without invalidating the remaining
provisions hereof or affecting the validity or enforceability of such provision
in any other jurisdiction.

     The provisions of this note shall inure to the benefit of the Holder, its
successors and assigns and shall be binding upon their heirs, successors and
assigns of each Obligor, except that no Obligor may assign or transfer his, her
or its obligation hereunder without the written consent of Holder.

     All rights, powers and remedies of Holder under this note and now or
hereafter existing at law, in equity or otherwise shall be cumulative and may be
exercised successively or concurrently.

     The Loan Documents contain the entire understanding and agreement between
the Borrower and the Holder with respect to the Loan and supersede any and all
prior agreements, understandings, promises, and statements with respect to the
Loan. This Master Note may not be modified, amended, or supplemented in any
manner except by a written agreement executed by both the Borrower and the
Holder.

     This note shall be construed in accordance with and governed by the laws
of the State of Alabama.

     This agreement is executed under seal by the Borrower of each of them.

       CAUTION-IT IS IMPORTANT THAT YOU THOROUGHLY READ THIS MASTER NOTE
                               BEFORE YOU SIGN IT

No. 468156  702159             Boyd Brothers Transportations, Inc.
    --------------             ----------------------------------- [SEAL]

Due July 6, 2001               By: /s/ Richard C. Bailey
    --------------             ----------------------------------- [SEAL]

                               Its: CFO
                               ----------------------------------- [SEAL]

                               ----------------------------------- [SEAL]

                               ----------------------------------- [SEAL]
<PAGE>   2

                                GUARANTY OF NOTE

         For value received and in consideration of the credit extended or to be
extended to the maker or makers (whether one or more, called the "Maker") of the
master note on the reverse side hereof (together with any extension and renewal
thereof called the "Note") by the payee hereof (together with its successors and
assigns and every subsequent holder of the Note called the "Holder"), which the
undersigned requested, and in further consideration of the sum of ten dollars
and other good and valuable consideration to the undersigned in hand paid by
said payee, the receipt and sufficiency of which are hereby acknowledged, the
undersigned (if more than one, jointly and severally) hereby (a) unconditionally
and absolutely guarantees to the Holder the prompt payment, when and as due and
payable (whether by acceleration or otherwise), of all indebtedness evidenced by
the Note, including without limitation principal, interest, Recovered payments
(as hereinafter defined), costs, and expenses (collectively, the "Debts") and
agrees to pay any of the Debts on demand at any time after the maturity thereof;
(b) agrees to be bound by all of the terms and provisions of the Note (including
the terms waiving notice and agreeing to pay costs and expenses of collection,
such as reasonable attorneys' fees, in the event of default); (c) agrees that
the Holder will not be required first to resort to the maker or any other
endorser, surety, or guarantor (each maker, other endorser, surety, or guarantor
being hereinafter individually called an "Obligor") or to any guaranty or other
security (collectively, the "Collateral") pledged or granted to it by any
instrument or agreement (collectively, the "Security Documents" and individually
, a "Security Document"), or otherwise assigned or conveyed to it, but in case
of default in the payment of any of the Debts, the Holder may forthwith look to
the undersigned, jointly and severally, for payment under the provisions hereof;
(d) agrees that the obligations of the undersigned hereunder are absolute,
unconditional, present and continuing guaranties of payment and not collectively
and shall not be subject to any counterclaim, recoupment, set-off, reduction or
defense based upon any claim that the undersigned, or any of them, may have
against the Maker, the Holder or any Obligor; (e) agrees that any of the Debts
may be renewed, extended or modified, in whole or in part, by the execution of a
new Note or otherwise, and this guaranty shall be made to extend to and cover
such extended, renewed or modified Debts, on whatever terms and conditions the
same may be extended, renewed or modified, without the necessity for the
undersigned to execute any new guaranty agreement guaranteeing or Note
evidencing the same or any other document and without regard to the number of
times or the manner in which the same may have been or shall be extended,
renewed or modified; (f) agrees that the obligations and liabilities of the
undersigned hereunder shall not be discharged, impaired, modified or otherwise
affected by (i) the unenforceability, non-existence, invalidity, non-perfection,
or impairment of the Note, any of the Debts, any Collateral or any Security
Document, (ii) any understanding or agreement that any other person, firm or
corporation was or is to sign, guarantee or become bound on or for the Note or
any Security Document, (iii) the Holder's resort or failure or refusal to resort
to any other security or remedy for the collection of any of the Debts, (iv) the
sale, exchange, release or surrender of any of the Collateral or the release or
discharge of any Obligor, (v) the death or bankruptcy of any Obligor, or in the
case of such death or bankruptcy, the failure of the Holder to file a claim
against the estate of such deceased or bankrupt Obligor, (vi) any renewal,
extension, modification, amendment, supplement, or change in the status or terms
of the Note, the Debts, any Collateral, or Security Document, (vii) any default
by the maker under the Note or any Security Document, (viii) any compromise,
settlement, release, discharge, termination, waiver, or extension of time for
payment, performance, or observance of any of the Debts, (ix) the application of
any payments, proceeds of Collateral or other sums to the Debts or any other
indebtedness, obligations or liabilities of the Maker to the Holder, now or
hereafter existing, in such order as the Holder may elect, (x) any exercise or
non-exercise of any right, remedy, power, or privilege of the Holder with
respect to the Debts, any Collateral or any Obligor, (xi) any failure, omission,
delay or lack of diligence on the part of Holder to enforce, assert or exercise
any such right, power, privilege, or remedy, or (xii) any claim (including, but
not limited to, a counterclaim) that any Obligor may have against the Holder,
(viii) any other event, circumstance, or condition, and (g) agrees that it shall
not be necessary for the Holder to give the undersigned notice of, or obtain
consent or approval of the undersigned in connection with, (i) the making of any
advances or extensions of credit under the Note, (ii) any of the matters set
forth in clauses (a) through (f) hereof, or (iii) the Holder's acceptance of
this agreement and reliance thereon.

         This Guaranty, and the undersigned's obligations hereunder shall
continue to be effective or be automatically reinstated, as the case may be,
any time payment of all or any part of the Debts is recovered (a "Recovered
Payment") from the Holder as a result of a preference or other claim made under
any bankruptcy, insolvency, dissolution, liquidation, reorganization,
receivorship, or similar law or otherwise. The collateral, if any, securing this
Guaranty may be held by the Holder until it is satisfied that all time periods
during which the payment of all or any part of the Debts may be recovered from
the Holder as a result of a preference or other claim under any bankruptcy,
insolvency, dissolution, liquidation, reorganization, receivorship, or similar
law or otherwise have elapsed.

         Any act or circumstance that shall toll any statute of limitations
applicable to the Debts shall also toll the statute of limitations applicable to
the undersigned's liability for the Debts under this Guaranty.

         Each of the undersigned who now is or hereafter becomes an "insider,"
as defined in the 11 U.S.C. ss. 101 (or any amendment or successor thereto or
replacement thereof), of the maker herby waives and relinquishes all rights
(including without limitation rights or subrogation) that such undersigned now
has or hereafter may have to recover from or be reimbursed by the Maker or the
Maker's property, or from any person, firm, or corporation that may now or
hereafter have such a right to recover from or be reimbursed by the Maker or the
Maker's property, any amounts paid by such undersigned to satisfy, in whole or
in part, the Debts. The provisions of this paragraph are made for the express
benefit of the maker as well as the Holder and may be enforced independently by
the Maker.

         This Guaranty, the Mater Note on the other side and all other
agreements or instruments evidencing, guaranteeing, securing, or executed in
connection with the Debts contain the entire understanding and agreement between
the undersigned and the Holder and supersede any and all prior agreements,
understandings, promises, and statements with respect to the Debts.

         CAUTION-IT IS IMPORTANT THAT YOU THOROUGHLY READ THIS CONTRACT
                              BEFORE YOU SIGN IT.

                                                                          [SEAL]
                                            ------------------------------

                                                                          [SEAL]
                                            ------------------------------
<PAGE>   3
                                   EXHIBIT A

The interest rate on this note shall be one and three quarters percent (1.75%)
per annum in excess of the average offered rate in the London interbank market
for deposits in U.S. dollars for ninety (90) days (the "LIBOR Rate") as
published in the Wall Street Journal or such other comparable financial
information reporting service used by the Bank at the time such rate is
determined.

Boyd Brothers Transportation, Inc.

By: /s/ Robert Bailey
    ------------------------------
Its: CFO

July 7, 2000

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