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                                                                     EXHIBIT 2.4

                          REGISTRATION RIGHTS AGREEMENT

         THIS REGISTRATION RIGHTS AGREEMENT dated as of July ___, 1998 by and
among DIGITAL RECORDERS, INC., a North Carolina corporation (the "Company") and
Messrs. DAVID L. TURNEY and CLAUDE G. ROBINSON (the "Holders").

         The parties agree as follows:

         SECTION 1.  DEFINITIONS.  For purposes of this Agreement:

                  (a) "Common Stock" means the Company's Common Stock, $.10 par
         value;

                  (b) "Registrable Securities" means 200,000 shares of Common
         Stock to be issued to the Holders upon closing of that certain Merger
         described in an Agreement and Plan of Reorganization of even date (the
         "Agreement"; certain terms not defined herein but used herein are used
         as defined in the Agreement);

                  (c) "register" and "registration" refer to a registration of
         the Registrable Securities effected by filing a registration statement
         or similar document pursuant to the Securities Act of 1933, as amended
         (the "Act") and the declaring or ordering of effectiveness of such
         registration statement; and

                  (d) The "Company" means Digital Recorders, Inc., a North
         Carolina corporation.

         SECTION 2.  DEMAND REGISTRATION.

                  (a) If at any time after July 1, 1998 and before January 1,
         1999, the Company receives a written request from a majority of the
         Holders that the Company file a registration statement under the Act
         covering the registration of Registrable Securities held by them, then
         the Company shall, subject to the limitations of this Section 2, use
         its best efforts to, within six months of the date of such request,
         effect the registration under the Act of all Registrable Securities and
         will keep such registration statement effective for a minimum period of
         24 months thereafter. The Company shall be obligated to effect only one
         (1) registration pursuant to this Section 2(a).

                  (b) If the Holders intend to distribute the Registrable
         Securities covered by their request by means of an underwriting, they
         shall so advise the Company as a part of their request made pursuant to
         this Section 2. The Holders shall (together with the Company as
         provided in Section 3) enter into an underwriting agreement in
         customary form with a mutually acceptable underwriter or underwriters.


SECTION 3. "PIGGYBACK" RIGHTS. For a period of two years from July 1, 1998, and
if (but 

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without any obligation to do so) the Company proposes to register any of its
securities under the Act in connection with a public offering of such common
stock for cash proceeds payable in whole or in part to the Company (other than
with respect to a Registration Statement filed on Form S-8 or Form S-4 or such
other similar form then in effect under the Securities Act), the Company shall,
at such time, subject to the provisions of Section 6 and 7 hereof and upon
request of the Holders cause to be registered under the Act all of the
Registrable Securities which the Holders request be registered; provided,
however, if the managing underwriter of the public offering of shares proposed
to be registered by the Company advises the Holders in writing that marketing
factors require a limitation of the number of shares to be underwritten, then
the number of shares of Registrable Securities of the Holders that may be
included in the underwriting shall be so limited pro rata. Such "piggyback
rights" shall expire on the registration and sale of the Registrable Securities
pursuant to Section 2 above or upon the sale of the Registrable Securities
hereunder, but in no event later than July 1, 2000.

         SECTION 4. REGISTRATION PROCEDURE. Whenever required under this
Agreement to effect the registration of any Registrable Securities, the Company
shall, as expeditiously as is reasonably possible:

                  (a) Furnish to the Holders of the Registrable Securities
         covered by such registration statement such number of copies of a
         prospectus, including a preliminary prospectus, in conformity with the
         requirements of the Act, and such other documents as they may
         reasonably request in order to facilitate the disposition of the
         Registrable Securities owned by them.

                  (b) In the event of any underwritten public offering, enter
         into and perform its obligations under an underwriting agreement, in
         usual and customary form, with the managing underwriter of such
         offering. The Holders participating in such underwriting shall also
         enter into and perform their obligations under such agreement.

                  (c) Notify the Holders of Registrable Securities covered by
         such registration statement, at any time when a prospectus relating
         thereto covered by such registration statement is required to be
         delivered under the Act, of the happening of any event as a result of
         which the prospectus included in such registration statement, as then
         in effect, includes an untrue statement of a material fact or omits to
         state a material fact required to be stated therein or necessary to
         make the statements therein not misleading in the light of the
         circumstances then existing.

         SECTION 5. FURNISH INFORMATION. The Holders shall promptly furnish to
the Company in writing such reasonable information regarding the Holders, the
Registrable Securities held by the Holders, and the intended method of
disposition of such securities as shall be required to effect the registration
of their Registrable Securities.

         SECTION 6. EXPENSES OF REGISTRATION. All of the foregoing expenses
relating to 


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the Registrable Securities incurred in connection with registration, filing or
qualification pursuant to this Agreement, including (without limitation) all
registration, filing and qualification fees, printers' bills, mailing and
delivery expenses, accounting fees, and the fees and disbursements of counsel
for the Company, but excluding underwriting discounts or fees, shall be borne by
the Company.

         SECTION 7. INDEMNIFICATION AND CONTRIBUTION. In the event any
Registrable Securities are included in a registration statement under this
Agreement:

                  (a) To the extent permitted by law, the Company will indemnify
         and hold harmless each Holder, the officers and directors of each
         Holder, any underwriter (as defined in the Act) for such holder, and
         each person, if any, who controls such Holder or underwriter within the
         meaning of the Act or the Securities Exchange Act of 1934 (the
         "Exchange Act"), against any losses, claims, damages, or liabilities
         (joint or several) to which they may become subject under the Act, the
         Exchange Act or other federal or state law, insofar as such losses,
         claims, damages, or liabilities (or actions in respect thereto) arise
         out of or are based upon any untrue statement or alleged untrue
         statement of a material fact contained in such registration statement,
         including any preliminary prospectus or final prospectus contained
         therein or any amendments or supplements thereto, or arise out of or
         are based upon the omission or alleged omission to state therein a
         material fact required to be stated therein or necessary to make the
         statements therein not misleading; and the Company will reimburse each
         such Holder, officer or director, underwriter or controlling person for
         any legal or other expenses reasonably incurred by them in connection
         with investigating or defending any such loss, claim, damage,
         liability, or action; provided however, that the indemnity agreement
         contained in this Section 7(a) shall not apply to amounts paid in
         settlement of any such loss, claim, damage, liability, or action if
         such settlement is effected without the consent of the Company (which
         consent shall not be unreasonably withheld), nor shall the Company be
         liable in any such case for any such loss, claim, damage, liability, or
         action to the extent that it arises out of or is based upon an untrue
         statement or alleged untrue statement or omission or alleged omission
         made in such registration statement, preliminary prospectus or final
         prospectus or any amendment or supplement thereto in reliance upon and
         in conformity with written information furnished expressly for use in
         connection with such registration by any such Holder, underwriter or
         controlling person; provided, further, however, that if any losses,
         claims, damages or liabilities arise out of or are based upon any
         untrue statement, alleged untrue statement, omission or alleged
         omission contained in any preliminary prospectus, and made in reliance
         upon and in conformity with written information furnished by such
         Holder expressly for use therein, which did not appear in the final
         prospectus, the Company shall not have any such liability with respect
         thereto to such Holder, any person who controls such Holder within the
         meaning of the Act, or any director of such Holder, if such Holder
         delivered a copy of the preliminary prospectus to the person alleging
         such losses, claims, damages or liabilities and failed to deliver a
         copy of the final prospectus, as amended or supplemented if it has been
         amended or 


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         supplemented, to such person at or prior to the written confirmation of
         the sale to such person, provided that such Holder had an obligation to
         deliver a copy of the final prospectus to such person; and

                  (b) To the extent permitted by law, each selling Holder will
         indemnify and hold harmless the Company, each of its directors, each of
         its officers who has signed the registration statement, each person, if
         any, who controls the Company within the meaning of the Act, any
         underwriter and any other Holder selling securities in such
         registration statement or any of its directors or officers or any
         person who controls such Holder or underwriter against any losses,
         claims, damages or liabilities, joint or several) to which the Company
         or any such director, officers, controlling person, or underwriter or
         controlling person, or other such Holder or director, officer or
         controlling person may become subject, under the Act, the Exchange Act
         or other federal or state law, insofar as such losses, claims, damages
         or liabilities (or actions in respect thereto) arise out of or are
         based upon any untrue statement or alleged untrue statement of a
         material fact contained in such registration statement, including any
         preliminary prospectus or final prospectus contained therein or any
         amendments or supplements thereto, or arise out of or are based upon
         the omission or alleged omission to state therein a material fact
         required to be stated therein or necessary to make the statements
         therein not misleading, if the untrue statement or omission or alleged
         untrue statement or omission in respect of which such loss, claim,
         damage or liability is asserted was made in reliance upon and in
         conformity with written information furnished by such Holder expressly
         for use in connection with such registration; and each such Holder will
         reimburse any legal or other expenses reasonably incurred by the
         Company or any such director, officer, controlling person, underwriter
         or controlling person, or other Holder, officer, director, or
         controlling person in connection with investigating or defending any
         such loss, claim, damage, liability or action; provided however, that
         the indemnity agreement contained in this Section 7(b) shall not apply
         to amounts paid in settlement of any such loss, claim, damage,
         liability or action, if such settlement is effected without the consent
         of the Holder (which consent shall not be unreasonably withheld);
         provided, further that the maximum liability of any selling Holder
         under this Section 7(b) in regard to any registration statement shall
         in no event exceed the amount of the proceeds received by such selling
         Holder from the sale of securities under such registration statement;
         provided, further however, that if any losses, claims, damages or
         liabilities arise out of or are based upon an untrue statement, alleged
         untrue statement, omission or alleged omission contained in any
         preliminary prospectus which did not appear in the final prospectus,
         such seller shall not have any such liability with respect thereto to
         the Company, any person who controls the Company within the meaning of
         the Act, any officer of the Company who signed the registration
         statement or any director of the Company, if the Company delivered a
         copy of the preliminary prospectus to the person alleging such losses,
         claims, damages or liabilities and failed to deliver a copy of the
         final prospectus, as amended or supplemented if it has been amended or
         supplemented, to such person at or prior to the written confirmation of
         the sale to such person, provided 


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         that the Company had an obligation to deliver a copy of the final
         prospectus to such person.

                  (c) Promptly after receipt by an indemnified party under this
         Section 7 of notice of the commencement of any action (including any
         governmental action), such indemnified party will, if a claim in
         respect thereof is to be made against any indemnifying party under this
         Section 7, deliver to the indemnifying party a written notice of the
         commencement thereof, and the indemnifying party shall have the right
         to participate in and, to the extent the indemnifying party so desires,
         jointly with any other indemnifying party similarly notified, to assume
         the defense thereof with counsel mutually satisfactory to the parties.
         An indemnified party shall have the right to retain its own counsel,
         however, the fees and expenses of such counsel shall be at the expense
         of the indemnified party, unless (i) the employment of such counsel has
         been specifically authorized in writing by the indemnifying party, (ii)
         the indemnifying party has failed to assume the defense and employ
         counsel, or (iii) the named parties to any such action (including any
         impleaded parties) include both the indemnified party and the
         indemnifying party, and the indemnified party shall have been advised
         by such counsel that there may be one or more legal defenses available
         to it which are different from or additional to those available to the
         indemnifying party (in which case the indemnifying party shall not have
         the right to assume the defense of such action on behalf of such
         indemnified parry, it being understood, however, that the indemnifying
         party shall not, in connection with any one such action or separate but
         substantially similar or related actions in the same jurisdiction
         arising out of the same general allegations or circumstances, be liable
         for the reasonable fees and expenses of more than one separate firm of
         attorneys for all indemnified parties). The failure to deliver written
         notice to the indemnifying party will not relieve it of any liability
         that it may have to any indemnified party under this Agreement.

              (d)          If the indemnification provided for in this Section 7
                  is unavailable or insufficient to hold harmless an indemnified
                  party in respect of any losses, claims, damages or liabilities
                  or actions in respect thereof referred to therein, then each
                  indemnifying party shall in lieu of; indemnifying such
                  indemnified party contribute to the amount paid or payable by
                  such indemnified party as a result of such losses, claims,
                  damages, liabilities or actions in such proportion as is
                  appropriate to reflect the relative fault of the Company, on
                  the one hand, and selling Holders, on the other, in connection
                  with the statements or omissions which resulted in such
                  losses, claims, damages, liabilities or actions as well as any
                  other relevant equitable considerations, including the failure
                  to give any required notice. The relative fault shall be
                  determined by reference to, among other things, whether the
                  untrue or alleged untrue statement of a material fact or the
                  omission or alleged omission to state a material fact relates
                  to information supplied by the Company, on the one hand, or by
                  such selling Holders on the other, and the parties' relative
                  intent, knowledge, 


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                  access to information and opportunity to correct or prevent
                  such statement or omission. The parties hereto acknowledge and
                  agree that it would not be just and equitable if contribution
                  pursuant to this subparagraph (d) were determined by prorata
                  allocation (even if all of the selling Holders were treated as
                  one entity for such purpose) or by any other method of
                  allocation which does not take account of the equitable
                  considerations referred to above in this subparagraph (d). The
                  amount paid or payable by an indemnified party as a result of
                  the losses, claims, damages, liabilities or actions in respect
                  thereof referred to above in this subparagraph (d) shall be
                  deemed to include any legal or other expenses reasonably
                  incurred by such indemnified party in connection with
                  investigating or defending any such action or claim.
                  Notwithstanding the provisions of this subparagraph (d), the
                  amount the selling Holders shall be required to contribute
                  shall not exceed the amount, if any, by which the total price
                  at which the securities sold by each of them were offered to
                  the public exceeds the amount of any damages which they would
                  have otherwise been required to pay by reason of such untrue
                  or alleged untrue statement or omission or alleged omission,
                  or other violation of law. No person guilty of fraudulent
                  misrepresentation (within the meaning of Section 11(f) of the
                  Act) shall be entitled to contribution from any person who was
                  not guilty of fraudulent misrepresentation

         SECTION 8.  MISCELLANEOUS.

                  (a) Binding Effect. This Agreement shall be binding upon and
         shall inure to the benefit of the Company and to the Holders and their
         respective heirs, personal representatives, successors and assigns.

                  (b) Notices. Except as otherwise provided herein, any notice,
         consent or request to be given in connection with any term or provision
         of this Agreement shall be deemed to have been given sufficiently if
         sent by hand, registered or certified mail, postage prepaid, facsimile
         transmission or courier (next day delivery), to the Company or to the
         Holders at their respective addresses as provided on or about the date
         hereof.

                  (c) Integration. This Agreement contains the entire agreement
         between the parties with respect to the transactions contemplated
         hereby and no party shall be bound by, nor shall any party be deemed to
         have made, any covenants, representations, warranties undertakings or
         agreements except those contained in such entire Agreement. The section
         and paragraph headings contained in this Agreement are for the
         reference purposes only and shall not affect in any way the meaning or
         interpretation of this Agreement.

                  (d) Counterparts. This Agreement may be executed in one or
         more counterparts, each of which shall be deemed to be an original, but
         all of which 


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         together shall constitute one and the same agreement.

                  (e) Amendment. This Agreement may be amended, changed, waived
         or terminated only in writing signed by each of the parties.

         IN WITNESS WHEREOf, this Agreement has been executed effective as of
the date first above written.

                                             DIGITAL RECORDERS, INC.

                                             By
                                               ---------------------------------
                                               President

                                             HOLDERS:

                                                                          (SEAL)
                                             -----------------------------
                                             DAVID L. TURNEY

                                                                          (SEAL)
                                             -----------------------------
                                             CLAUDE G. ROBINSON


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