AMENDED AND RESTATED
                                     BYLAWS
                                       OF
                           KNIGHT TRANSPORTATION, INC.



                  The Bylaws of Knight  Transportation,  Inc.,  set forth below,
amend and supersede in their entirety the Bylaws  adopted by the  corporation on
April 11, 1995, effective as of the time set forth in Section 9 below.

Section 1.  Identification
            --------------

                  1.1   Name.   The   name   of  the   corporation   is   Knight
Transportation, Inc.

                  1.2 Principal Office.  The principal office of the corporation
shall be at 5601 West Buckeye Road, Phoenix, Arizona, and additional offices may
be maintained at such other places within or without the State of Arizona as the
Board of Directors may from time to time designate.

                  1.3 Fiscal Year. The fiscal year of the  corporation  shall be
the calendar year ending December 31 of each year.


Section 2.  Meetings of Shareholders
            ------------------------

                  2.1 Annual  Meeting.  Effective for calendar  years  beginning
after December 31, 1994, the annual meeting of shareholders shall be held on the
second Wednesday in May, if not a legal holiday, and if a legal holiday, then on
the next  business  day  following,  or at such  other date and time as shall be
designated  from time to time by the Board of Directors and stated in the notice
of meeting. At the annual meeting, shareholders shall elect a Board of Directors
and transact such other business as may properly be brought before the meeting.

                  2.2  Notice.  No notice of the annual  meeting  need be given.
Unless  properly  waived,  notice of any special  meeting shall be mailed to the
last known address of each shareholder as the same appears on the records of the
corporation,  at least ten (10) days and not more than  fifty (50) days prior to
such  meeting,  and shall state in general the  purposes for which it is called.
Notice  to  shareholders  shall not be  necessary  for any  adjourned  annual or
special meeting except the statement at such meeting in making adjournment.

                  2.3  Presiding  Officer.  The Chairman,  or in his absence,  a
chairman  appointed  by the  shareholders  present,  shall call  meetings of the
shareholders to order, and shall act as chairman thereof.

                  2.4  Quorum.  A  majority  of  the  voting  stock  issued  and
outstanding,  represented  by the holders  thereof either in person or by proxy,
appointed by an instrument in writing and subscribed by such shareholder,  shall
be a quorum at all meetings of shareholders.

                  2.5  Adjournment.  If at any  annual  or  special  meeting  of
shareholders, a quorum shall fail to attend in person or by proxy, a majority in
interest of the shareholders attending in person or by proxy at the time of such
meeting  may,  at the end of an hour,  adjourn  the  meeting  from  time to time
without  further notice until a quorum shall attend,  and thereupon any business
may be transacted  which might have been transacted at the meeting as originally
called had the same been held.

                  2.6 Special Meetings. Special meetings of the shareholders for
any purpose shall be held whenever called by a vote of the majority of the Board
of Directors,  and shall be called whenever shareholders owning one-tenth of the
capital  stock  issued and  outstanding  shall,  in  writing,  make  application
therefor to the  President,  stating the object of such meeting.  Notice thereof
shall be given as provided in Section 2.2.

                  2.7   Voting.   At  all  annual  and   special   meetings   of
shareholders,  every holder of voting shares of stock may appear and vote either
in person or by proxy in  writing,  and  shall  have one vote for each  share of
voting  stock,  so held and  represented  at such  meeting,  with  the  right to
cumulate  such votes for the election of  directors.  All proxies shall be filed
with the Secretary of the corporation prior to any meeting for which they are to
be effective.  Upon demand of any  shareholder,  voting upon any question at any
meeting shall be by ballot.

                  2.8 Order of  Business  and Rules of  Procedure.  The order of
business  and the rules of  procedure  used at any  meeting of the  shareholders
shall be as determined by the chairman.

                  2.9 Closing of Transfer  Books and Fixing Record Date. For the
purpose  of  determining  shareholders  entitled  to notice of or to vote at any
meeting of  shareholders,  or any  adjournment  thereof,  or entitled to receive
payment of any dividend, or in order to make a determination of shareholders for
any other purpose,  the Board of Directors of the  corporation  may provide that
the stock transfer  books shall be closed for a stated period not to exceed,  in
any case,  sixty (60) days. If the stock  transfer books shall be closed for the
purpose  of  determining  shareholders  entitled  to  notice  of or to vote at a
meeting  of the  shareholders,  the books  shall be closed for at least ten (10)
days  immediately  preceding the meeting.  In lieu of closing the stock transfer
books,  the Board of Directors  may fix in advance a date as the record date for
any such  determination of shareholders,  such date, in any case, to be not more
than  sixty (60) days nor less than ten (10) days prior to the date on which the
particular  action requiring this  determination of shareholders is to be taken.
If the stock  transfer  books are not closed and no record date is fixed for any
such  purpose,  then the record  date shall be  determined  in  accordance  with
Section  10-030  of  the  Arizona  Revised  Statutes.  When a  determination  of
shareholders has been made as provided in this section,  the determination shall
apply to any adjournment thereof.
                                       -2-

                  2.10 Voting List. The Secretary of the corporation  shall make
from the stock transfer books a complete record of the shareholders  entitled to
vote at the meeting or any adjournment thereof,  arranged in alphabetical order,
with the address of and the number of shares held by each.  Such record shall be
produced and kept open at the time and place of the meeting and shall be subject
to the  inspection of any  shareholder  during the whole time of the meeting for
the purposes  thereof.  Failure to comply with the  requirements of this section
shall not affect the validity of any action taken at the meeting.

                  2.11 Action Without A Meeting. Any action required to be taken
at a meeting of the shareholders of the  corporation,  or any action that may be
taken at a meeting  of the  shareholders,  may be taken  without a meeting  if a
consent in writing  setting  forth the action so taken shall be signed by all of
the  shareholders  entitled to vote with respect to the subject matter  thereof.
This consent shall have the same effect as a unanimous vote of shareholders  and
may be stated as such in any document.

Section 3.  Board of Directors
            ------------------

                  3.1  Number.  The  Articles  of  Incorporation  authorize  the
business and affairs of the  Corporation to be managed and controlled by a Board
of Directors of not less than three (3) nor more than eleven (11) directors, who
need not be  shareholders  of the  Corporation  or residents of this State.  The
Board shall be comprised of nine (9) members, but by a vote of a majority of the
Board of Directors, additional directors may be added.

                  3.2 Removal. At a meeting of shareholders called expressly for
that purpose, any director or the entire Board of Directors may be removed, with
or without  cause,  by a vote of the  holders of a majority  of the shares  then
entitled to vote at an election of directors.  Provided,  however,  that if less
than the entire board is to be removed,  no one of the  directors may be removed
if the votes cast against his removal  would be  sufficient to elect him if then
cumulatively voted at an election of the entire Board of Directors.

                  3.3 Annual  Meeting.  Immediately  after the annual meeting of
the  shareholders,  the  newly-elected  directors  shall meet for the purpose of
organization, the election of officers, and the transaction of other business.

                  3.4  Special  Meetings.  Special  meetings of the Board may be
held  after  proper  notice  has been  given,  unless  properly  waived.  Unless
otherwise  specified  in  the  notice  thereof,  any  and  all  business  may be
transacted at a special meeting.

                  3.5 Notice of Meetings. No notice of the annual meeting of the
Board of Directors need be given. Unless properly waived,  notice of any special
meeting of the Board of  Directors,  stating  the time and in general  terms the
purpose or purposes  thereof,  shall be mailed to all of the  directors at least
ten (10) days prior to such meeting,  to the last known address of each director
as the same appear on the records of the corporation.
                                       -3-

                  3.6 Place of Meeting. The directors shall hold their meetings,
have an office  and keep the books of the  corporation  at such  place or places
within or without  the State of Arizona as the Board of  Directors  from time to
time may  determine.  Unless  otherwise  determined,  such place shall be at the
principal office of the corporation,  as stated in Section 1.2 hereof.  Meetings
of the Board of Directors,  whether regular or special,  may be held by means of
telephone  conference  or  similar  equipment  by  means of  which  all  persons
participating  in the meeting can hear each other,  and  participation in such a
meeting shall constitute presence in person at such meeting.

                  3.7  Quorum.  A  majority  of the  Board  of  Directors  shall
constitute a quorum for the transaction of business.  The act of the majority of
the directors present at a meeting at which a quorum is present shall be the act
of the Board of  Directors  unless the act of a greater  number is  required  by
statute, the Articles of Incorporation or the Bylaws.

                  3.8  Chairman.  At all meetings of the Board of Directors  the
Chairman,  or in his absence a chairman chosen by the directors  present,  shall
preside.

                  3.9  Committees.  From  time to time  the  Board  may  appoint
committees  for any purpose,  who shall have such power as shall be specified in
the resolution of appointment.

                  3.10 Compensation.  Any officer or employee of the corporation
serving  as a  director  and all  members  of  committees  shall  serve  without
compensation; however, they shall be paid the necessary expenses incurred in the
execution of their  duties.  Independent  directors who are not employees of the
corporation may receive such  compensation as the Board of Directors,  from time
to time, determines appropriate. Nothing herein shall preclude the paying by the
corporation of a salary or other  compensation  to an officer or employee who is
also a director.

                  3.11  Vacancies.  In case of any vacancy  among the  directors
through death, resignation,  disqualification, or other cause, or in the case of
a vacancy arising from the creation of a new directorship,  the other directors,
by  affirmative  vote of a  majority  thereof,  may fill  such  vacancy  for the
unexpired  portion  of the term of  directorship  which  is  vacant,  and  until
election of and qualification of his successor.

                  3.12 Action Without A Meeting. Any action that may be taken at
a meeting of the directors or of a committee may be taken without a meeting if a
consent in writing,  setting forth the action  taken,  shall be signed by all of
the directors or all of the members of the committee, as the case may be.

Section 4.  Officers
            --------

                  4.1 Executive. The executive officers of the corporation shall
be a  Chairman,  Chief  Executive  Officer,  President,  Vice  President,  Chief
Financial Officer and Secretary and any
                                       -4-

other  officers as may from time to time be  appointed,  each of whom shall hold
his office during the pleasure of the Board of Directors.

                  4.2 Tenure of Office. All officers shall be subject to removal
at any time, with or without cause, by the affirmative vote of a majority of the
Board of Directors.

                  4.3  Chairman.  The Chairman  shall preside at all meetings of
the shareholders  and of the directors.  He may, from time to time, call special
meetings of the Board of Directors whenever he shall deem it proper to do so and
shall do so when a  majority  of the Board of  Directors  shall  request  him in
writing to do so. The Chairman,  in the event of the Chief  Executive  Officer's
absence or inability to act, shall have all of the powers of the Chief Executive
Officer. The Chairman may sign and execute all authorized contracts, checks, and
other  instruments or obligations in the name of the  corporation.  The Chairman
shall do and perform  such other  duties and have such other powers as from time
to time may be assigned to him by the Board of Directors.

                  4.4 Chief Executive Officer. The Chief Executive Officer shall
be the chief executive officer of the corporation, and shall have general charge
of the  business  and  affairs of the  corporation.  He may sign and execute all
authorized  contracts,  checks, and other instruments or obligations in the name
of the corporation.  The Chief Executive Officer, in the event of the Chairman's
absence or inability to act,  shall have all of the powers of the Chairman.  The
President  shall do and perform  such other duties and have such other powers as
from time to time may be assigned to him by the Board of Directors.

                  4.5  President.  The  President  shall be the chief  operating
officer and shall be responsible  for all corporate  sales and all operations of
the corporation's truck fleet. He may sign and execute all authorized contracts,
checks, and other instruments or obligations in the name of the corporation. The
President,  in the event of the absence or  inability  of the Chairman and Chief
Executive  Officer  to act,  shall  have all the  powers of both  officers.  The
President  shall do and perform  such other duties and have such other powers as
from time to time may be assigned to him by the Board of Directors.

                  4.6 Vice  President.  The Vice  President may be designated as
Executive Vice President.  Any person appointed Executive Vice President may, in
the event of the President's absence or inability to act, have all of the powers
of the  President.  The  Executive  Vice  President  may  sign and  execute  all
authorized  contracts,  checks, and other instruments or obligations in the name
of the Company in an amount authorized by the Board of Directors.  The Executive
Vice President  shall have general charge of the sales and marketing  aspects of
the Company's Los Angeles operations.  He shall perform such other duties as the
Board of Directors shall delegate to him.

                  4.7  Secretary.  The  Secretary  shall keep the minutes of all
proceedings  of the Board and the minutes of all  meetings of  shareholders.  He
shall attend to the giving and serving of all notices for the  corporation  when
directed by the President.  He may sign with the  President,  in the name of the
corporation,  all contracts authorized by the Board, and shall have authority to
affix
                                       -5-

the seal of the  corporation  thereto.  He shall have charge of all  certificate
books and such other  books and papers as the Board may  direct;  he shall sign,
with the President, certificates of stock. He shall, in general, perform all the
duties  incident to the office of the  Secretary,  subject to the control of the
Board.

                  4.8  Chief  Financial  Officer;   Treasurer.  The  offices  of
Treasurer and Chief  Financial  Officer shall be occupied by the same person and
shall have the same duties and obligations. The Treasurer shall have the custody
of all the  funds  and  securities  of the  corporation  which may come into his
hands. He may endorse on behalf of the corporation for collection, checks, notes
and  other  obligations,  and  shall  deposit  the  same  to the  credit  of the
corporation in such bank or banks or  depositories as the Board of Directors may
designate.  He  may  sign  receipts  and  vouchers  for  payments  made  to  the
corporation.  He may sign checks made by the corporation and pay out and dispose
of the same under the direction of the Board.  He may sign,  with the President,
or  such  other  person  or  persons  as may be  designated  by the  Board,  all
authorized  promissory notes and bills of exchange of the corporation;  whenever
required by the Board he shall render a statement of his cash accounts. He shall
enter regularly in books of the corporation, to be kept by him for that purpose,
full and accurate  accounts of all monies received and paid by him on account of
the  corporation.  He shall  perform  all duties  incident  to the  position  of
Treasurer  subject to the  control  of the  Board.  The powers and duties of the
Treasurer may be exercised and  performed by any of the other  officers,  as the
Board may direct.

                  4.9   Miscellaneous.   Assistant   Secretaries  and  Assistant
Treasurers may be selected by the Board of Directors at any meeting.  They shall
perform any and all duties of the  Secretary and of the Treasurer in the absence
or  incapacity  of either,  and such other duties as the Board of Directors  may
require.

Section 5.  Capital Stock
            -------------

                  5.1 Payment for Shares.  The consideration for the issuance of
shares may be paid, in whole or in part, in money, in other  property,  tangible
or intangible,  or in labor or services actually  performed for the corporation.
When payment of the  consideration  for which shares are to be issued shall have
been received by the corporation,  or any wholly owned  subsidiary,  such shares
shall be deemed to be fully paid and nonassessable. Neither promissory notes nor
future services shall constitute  consideration  for the issuance of shares.  In
the absence of fraud in the transaction,  the judgment of the Board of Directors
as to the value of the  consideration  received  for  shares  shall be final and
conclusive.  No  certificate  shall be issued  for any share  until the share is
fully paid.

                  5.2 Certificates  Representing  Shares. Each holder of capital
stock of the  corporation  shall be  entitled  to a  certificate  signed  by the
President and the  Secretary of the corpora tion,  and sealed with the corporate
seal, certifying the number of shares owned by him in the corporation.
                                       -6-

                  5.3 Lost,  Stolen or Destroyed  Certificates.  The corporation
shall  issue a new stock  certificate  in place of any  certificate  theretofore
issued where the holder of record of the certificate:

                           (a)   Makes   proof  in   affidavit   form  that  the
certificate has been lost, destroyed or wrongfully taken;

                           (b) Requests the issuance of a new certificate before
the corporation has notice that the certificate has been acquired by a purchaser
for value in good faith and without notice of any adverse claim;

                           (c) Gives a bond in such form and with such surety as
the corporation may direct, to indemnify the corporation  against any claim that
may be made on  account  of the  alleged  loss,  destruction,  or  theft  of the
certificate;

                           (d)  Satisfies  any  other   reasonable   requirement
imposed by the corporation.

                  When a certificate  has been lost,  apparently  destroyed,  or
wrongfully taken and the holder of record fails to notify the corporation within
a  reasonable  time after he has notice of it, and the  corporation  registers a
transfer of the shares  represented by this  certificate  before  receiving such
notification,  the holder of record is precluded  from making any claim  against
the corporation for the transfer or for a new certificate.

                  5.4 Purchase of Its Own Shares.  The  corporation may purchase
its own  shares of stock from the  holders  thereof  subject to the  limitations
imposed by the Articles of Incorporation with respect thereto.

                  5.5 Dividends. The Board, in its discretion,  may from time to
time declare dividends upon the capital stock from the surplus or net profits of
the corporation when and in the manner it deems advisable, so long as no rule of
law is thereby violated.

Section 6.  Waiver of Notice
            ----------------

                  Any  shareholder,  director  or  officer  may waive any notice
required  to be  given by  these  Bylaws  of any  meeting  otherwise  prescribed
hereunder.  Any meeting at which all  shareholders  or directors are present (or
with respect to which notice is waived by any absent  shareholder  or direc tor)
may be held at any time for any  purpose and at any place and shall be deemed to
have been  validly  called and held,  and all acts  performed  and all  business
conducted at such meeting shall be valid in all respects.
                                       -7-

Section 7.  Indemnification
            ---------------

                  7.1 Indemnification.  The corporation shall indemnify and save
harmless all of its existing and former  directors from and against all expenses
incurred  by  them,  including,  but not  limited  to,  legal  fees,  judgments,
penalties,  and amounts paid in settlement or compromise,  to the fullest extent
not  prohibited  by law,  as it now  exists  or may  hereafter  be  amended,  in
connection with any proceeding,  actual or threatened, to which they may be made
a party by reason of their  service  to or at the  request  of the  corporation,
including service in their capacity as officers,  unless it is established that:
(i) the act or omission of the  indemnified  party was  committed  in bad faith;
(ii) the indemnified party did not believe such act or omission to be in, or not
opposed  to, the best  interests  of the  corporation;  (iii) in the case of any
criminal proceeding,  the indemnified party had reasonable cause to believe that
the act or omission was unlawful;  or (iv) the indemnified  party is adjudged to
be liable to the corporation unless a court of competent jurisdiction determines
that such person is entitled to indemnity.  The corporation shall advance to any
director  seeking  indemnification  pursuant to Section 7.1 expenses,  including
attorneys'  fees,  actually and  reasonably  incurred in defending  any civil or
criminal action,  suit or proceeding in advance of any final disposition of such
action, suit or proceeding upon receipt of an undertaking by or on behalf of the
director  seeking  indemnification  to repay  such  amount  if it is  ultimately
determined that he is not entitled to be indemnified by the corporation.  In the
event the  corporation is requested to indemnify an existing or former  director
in connection with any threatened,  pending or completed action or suit by or in
the right of the  corporation to procure  judgment in its favor by reason of the
fact that such  person was a  director,  officer,  or  employee  or agent of the
corporation,  or is or was  serving at the  request of the  corporation  in such
capacity,   the  corporation  shall  indemnify  such  person  against  expenses,
including  attorneys'  fees, but excluding  judgments and fines, and for amounts
paid in settlement,  actually and reasonably  incurred by him in connection with
the defense or  settlement  of such action or suit,  if such  person  acted,  or
failed to act, in good faith and in a manner he reasonably believed to be in, or
not  opposed  to,  the  best  interests  of  the  corporation,  except  that  no
indemnification  shall be made in respect  to any  claim,  issue or matter as to
which such  person  shall have been  adjudged  to be liable to the  corporation,
unless  and only to the  extent  that a court in which  such  action or suit was
brought shall  determine,  upon  application,  that despite the  adjudication of
liability,  but in view of all  circumstances of the case, such person is fairly
and  reasonably  entitled to indemnity for such  expenses  which the court shall
deem to be proper.

                  7.2  Determination  by Board.  Whenever any existing or former
director  shall  report  to the  President  that he has  incurred  or may  incur
expenses  described  in Section  7.1,  the Board of  Directors  (other  than any
interested  director) shall, at its next regular meeting or at a special meeting
held within a reasonable time thereafter,  determine  whether,  in regard to the
matter involved, the person in question is entitled to indemnification  pursuant
to Section 7.1. If the Board  determines  that the  standards of Section 7.1 are
met,  indemnification shall be made. In the event the Board of Directors refuses
to indemnify a person who is determined by a court of competent  jurisdiction to
be  entitled  to  indemnification  under  Section  7.1 or  applicable  law,  the
corporation shall, in addition to extending such indemnification,  reimburse the
person  entitled to  indemnification  for all attorneys' fees and costs of court
actually incurred. The corporation shall have the right to
                                       -8-

refuse   indemnification   in  any   instance   in  which  the  person  to  whom
indemnification  would  otherwise  have been  extended  unreasonably  refuses to
cooperate  in the  investigation  or  defense  of such  matter or to permit  the
corporation, at its own expense, to retain counsel of its own choosing to defend
him.

                  7.3  Indemnification  Agreement.  The Board of  Directors  may
authorize the corporation to indemnify directors,  officers, or employees to the
fullest extent permitted by law.

                  7.4 Non-Exclusivity.  The indemnification  rights contained in
this  Section 7 shall  not be  exclusive  of or  preclude  any  other  rights of
indemnification to which a director, officer, employee or agent may be entitled,
whether pursuant to law or agreement.


Section 8.  Amendment and Repeal
            --------------------

                  These  Bylaws may be amended or  repealed or new Bylaws may be
adopted by the Board of Directors in such instance as the Board may determine to
be advisable;  provided,  however, that the provisions of Section 7 shall not be
amended  except with the consent of a sixty-seven  percent (67%) majority of the
Board of  Directors.  No notice  need be given of any  action  concerning  these
Bylaws  previous  to any such  meeting,  if the  proposed  amendment,  repeal or
adoption of new Bylaws is one of necessity  arising at such  meeting,  and is in
furtherance of the legitimate aims of the corporation.  In all other situations,
unless properly waived, notice of any meeting at which any action concerning the
Bylaws is proposed shall be mailed to all directors at least ten (10) days prior
to such meeting,  and in the same manner prescribed for giving notice of special
meetings of the Board of Directors. Such notice shall state in general terms the
nature of any proposed action concerning the Bylaws.

Section 9.  Effective Date
            --------------

                  These  Amended and Restated  Bylaws of Knight  Transportation,
Inc. shall become effective as of December 20th, 1996.

                  Dated as of the 20th day of December, 1996.


                                        /s/Gary J. Knight
                                        ----------------------------------------
                                        Gary J. Knight, President


                                        /s/Clark A. Jenkins
                                        ----------------------------------------
                                        Clark A. Jenkins, Secretary
                                       -9-

                                   Certificate
                                   -----------

                  The   undersigned,   Clark   Jenkins,   Secretary   of  Knight
Transportation,  Inc. does hereby  certify that the foregoing copy of the Bylaws
of this corporation is a true and correct copy of the corporation's Bylaws, duly
adopted by the Board of Directors, and that such Bylaws have not been amended or
repealed.

                  DATED:  December 20, 1996.


                                        /s/Clark A. Jenkins
                                        ----------------------------------------
                                        Clark A. Jenkins, Secretary
                                      -10-