ASSIGNMENT AND ASSUMPTION OF LEASES, CONTRACTS, AND RIGHTS


     This   Assignment   and  Assumption  of  Leases,   Contracts,   and  Rights
("Assignment")  is  executed  and  delivered  as of March 13,  1999  ("Effective
Date"),  by ACTION DELIVERY  SERVICES,  INC., a Texas corporation  ("ADS"),  and
ACTION WAREHOUSE  SERVICE,  INC., a Texas  corporation  ("AWS") (ADS and AWS are
hereinafter individually and collectively called "Seller") to KNIGHT ACQUISITION
CORPORATION, an Arizona corporation ("Buyer").

                                    RECITALS

     A. Seller,  Buyer,  Bobby R. Ellis and Francis Ellis,  husband and wife and
Knight Transportation, Inc., an Arizona corporation, are parties to that certain
Asset  Purchase  Agreement  dated  March 13,  1999  ("Purchase  Agreement").  In
accordance with the Purchase  Agreement,  Seller has sold and assigned to Buyer,
and Buyer has purchased and acquired  from Seller,  the Business and Assets,  as
more particularly described therein.

     B. The terms and provisions of the Purchase Agreement require,  among other
things, that Seller execute this Assignment, transferring and assigning to Buyer
all of Seller's rights in certain Leases,  Contracts,  and other property rights
and interests of Seller relating to the Business.

     C.  Capitalized  terms which are used in this  Assignment but which are not
defined  specifically in this Assignment will be ascribed the meanings contained
in the Purchase Agreement.

                             TRANSFER AND ASSIGNMENT

     In  consideration  of Buyers  promises  and  covenants  under the  Purchase
Agreement  and the  purchase of the  Business,  and for other good and  valuable
consideration,  the receipt and  sufficiency of which are  acknowledged,  Seller
makes the following assignments to Buyer:

     1. Assignment of Contracts.

          (a) Seller  transfers  and assigns to Buyer,  and its  successors  and
     assigns,  all of the right,  title,  interest,  powers,  and  privileges of
     Seller under only the "Assigned  Contracts"  listed on Schedule "1" to this
     Assignment.  No  other  Contracts  (as  that  term is used in the  Purchase
     Agreement) will be transferred or assigned to Buyer.

          (b) Seller  represents  and  warrants  to Buyer  that:  (i) all right,
     title,  interest,  powers,  and privileges being assigned to and assumed by
     Buyer and all rights and options of third parties  relating to the Assigned
     Contracts  are  accurately  set  forth in their  entirety  in the  Assigned
     Contracts  attached  as  Schedule  "1";  (ii) no  contracts  or  agreements
     relating  to  management,  maintenance,  ownership,  or  operation  of  the
     Business,  other than those  listed on Schedule  "1",  have been entered by
     Seller which will remain in effect or become  effective after the Effective
     Date of this  Assignment;  (iii)  Seller  has  obtained  all  consents  and
     approvals necessary to assign and transfer the Assigned Contracts to Buyer;
     and (iv) there is no existing or uncured default or breach under any of the
     Assigned Contracts.

     2. Assumption by Buyer. Buyer accepts the foregoing assignment and transfer
of the Assigned  Contracts,  and assumes the obligations of Seller thereunder in
accordance with their terms,  but only to the extent such  obligations are to be
performed after the Effective Date of this Assignment (regardless of when demand
for payment or performance is made).

     3.  Assignment of  Miscellaneous  Items.  Seller  transfers,  assigns,  and
conveys to Buyer,  its  successors  and  assigns,  all  licenses  (to the extent
transferable), franchises, certificates, authorizations, approvals, certificates
of occupancy,  building permits and other applicable permits and licenses issued
by any  governmental  authority  relating to the  ownership  or operation of the
Business and the Assets, all goodwill, and other intangible personal property of
Seller relating to the Business,  and all personal property owned by Seller with
respect to the Business that have not otherwise  been conveyed by a concurrently
executed Bill of Sale from Seller to Buyer.

     4. Assignment of Warranties, Claims and Causes of Action.

          (a) Seller  transfers  and assigns to Buyer,  and its  successors  and
     assigns,  all of Seller's right, title, and interest in all representations
     or warranties (express or implied) and all other rights,  causes of action,
     or all claims of any kind  (collectively,  the "Rights") arising out of the
     Assigned Contracts and all other matters herein assigned.

          (b) Seller has  delivered to Buyer the  originals or, if the originals
     are not  available,  copies  of any  written  documents  which  Seller  (or
     Seller's agents or representatives) has/have within its/their possession or
     control relating to the Rights.

          (c) With respect to the Rights which cannot be effectively transferred
     to Buyer without the consent of third parties,  Seller and Buyer, after the
     Effective  Date,  will endeavor to obtain such consents  promptly,  and, if
     unattainable  or if the Rights  are  enforce  able only by Seller,  Seller,
     after the Effective  Date,  shall use its best efforts to provide Buyer the
     benefits of the Rights.

                                       -2-

     5. Miscellaneous.

               (a) Seller  agrees,  at its sole cost and  expense,  to  perform,
          execute, and/or deliver (or to cause to be performed, executed, and/or
          delivered) any  additional  documents  and/or  assurances as Buyer may
          reasonably  request to insure,  secure, or perfect Buyer's interest in
          any of the items assigned to Buyer by this  Assignment or to otherwise
          fully  and  effectively  carry  out the  intent  and  purpose  of this
          Assignment or the Purchase Agreement.

               (b) Seller  warrants and  represents to Buyer that the rights and
          interests of Seller  assigned under this Assignment are not subject to
          any prior assignment, lien, pledge, or encumbrance.

               (c) Seller and Buyer  warrant  and  represent  to each other that
          they have the requisite  power and authority to enter this  Assignment
          and have  performed  all acts and secured all  approvals  necessary to
          make this  Assignment  effective and legally  binding on such party in
          accordance  with its terms.  Each person  executing this instrument on
          behalf of either  party,  as agent or otherwise,  personally  warrants
          that he or she is duly  authorized and empowered to do so and that all
          signatures and approvals of persons with an ownership interest in such
          party  have  been  obtained  so as to  make  this  Assignment  legally
          enforceable and effective against such party.

               (d) This Assignment is binding upon the successors and assigns of
          Seller and will inure to the benefit of the  successors and assigns of
          Buyer, and all Rights and  representations of Seller contained in this
          Assignment  shall survive the Effective Date of this  Assignment,  and
          the delivery of this Assignment.

               (e) This Assignment  shall be governed by and  interpreted  under
          the  substantive  laws of the  State of  Arizona,  without  regard  to
          conflicts of law principles.

     6.  Indemnity.  Seller,  on demand,  agrees to  indemnify,  defend and hold
harmless  Buyer for, from, and against any and all loss,  cost,  damage,  claim,
liability,  or expense  (including court costs and attorney fees in a reasonable
amount)  arising out of the acts or  omissions  of Seller or its agents prior to
the Effective  Date with respect to the Assigned  Contracts,  and other property
being assigned by this Assignment. The indemnity described in this Assignment is
in  addition  to any  obligations  of the Seller to Buyer under the terms of the
Purchase Agreement.  Buyer agrees to indemnify,  defend and hold harmless Seller
for, from, and against any and all loss,  cost,  damage,  claim,  liability,  or
expense (including court costs and attorney fees in a reasonable amount) arising
out of the acts or  omissions of Buyer or its agents  after the  Effective  Date
with respect to the Assigned  Contracts,  and other  property  being assigned by
this Assignment.

                                       -3-


     This Assignment has been executed and delivered as of the Effective Date.


                                   SELLER:

                                   ACTION DELIVERY SERVICES, INC., a
                                   Texas corporation


                                   By: /s/ Bobby R. Ellis
                                      --------------------------------
                                         Bobby R. Ellis, President


                                   ACTION WAREHOUSE SERVICE, INC., a
                                   Texas Corporation


                                   By: /s/ Bobby R. Ellis
                                      --------------------------------
                                          Bobby R. Ellis, President


                                   BUYER:

                                   KNIGHT ACQUISITION CORPORATION,
                                   an Arizona corporation


                                   By: /s/ Kevin P. Knight
                                      --------------------------------
                                      Kevin P. Knight, Chief Executive Officer

                                       -4-

                                  SCHEDULE "1"
                                      TO
           ASSIGNMENT AND ASSUMPTION OF LEASES, CONTRACTS, AND RIGHTS

         All of the Seller's  accounts  receivable  (a list of which is attached
hereto),   notes  receivable,   inventory,   equipment,   machinery,   leasehold
improvements,  fixtures, tools, supplies, furniture, chattel paper and all other
intangible  assets  (collectively,  the  "Assets"),  as well as all customer and
other business product,  marketing , financial and technical lists,  records and
information, trade secrets, patents, service marks, trade names, and tread marks
and all proprietary and other rights and general intangibles,  including but not
limited to, the following:

     (1)  all rights to any  Intellectual  Property used or  contemplated  to be
          used in the Business, including, without limitation, all rights to the
          names,  and all goodwill  associated  therewith,  including all rights
          under  and  to the  names  and  any  trade  marks  and  service  marks
          associated  with the  Business  or under which the  Business  has been
          conducted;

     (2)  all  rights  and  entitlements  under any  written  or oral  contract,
          agreement, plans or specifications, instrument, registration, license,
          franchise,  certificate of occupancy,  or other document,  commitment,
          arrangement,   undertaking,   practice,   or  authorization   and  any
          intangible  property rights  associated with or constituting a part of
          the Business  (specifically  excluding,  however, any Employee Benefit
          Plan);

     (3)  all customer contracts,  including, without limitation, all rights and
          entitlements under or with respect to the following contracts attached
          hereto.

     (4)  the right to  collect  and  retain  all  amounts  under  the  Assigned
          Contracts;

     (5)  all rights or  choses-in-action  arising out of occurrences  before or
          after the Closing,  including,  without  limitation,  all rights under
          express or implied  warranties in favor of Seller, if any, relating to
          the Assets and the Business; and

                                       -5-

     (6)  The Assigned Contracts copies of which are attached hereto

Excluded Assets:

         The foregoing notwithstanding,  the purchased assets do not include the
Seller's  corporate records  including,  but not limited to, stock books,  stock
records,  minutes of any directors or shareholders  meetings,  files  maintained
with respect to directors or shareholders,  investment banking files, Securities
and  Exchange  Commission  files,  information  related  to  the  offer  of  any
securities of the Seller,  and property  belonging to any customer of the Seller
or any Employee Benefit Plans or the assets of any Employee Benefit Plan.


                                       -6-