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                                                                     EXHIBIT 4.9

                             SUPPLEMENTAL INDENTURE

                       TO INDENTURE DATED AUGUST 15, 1997

         THIS SUPPLEMENTAL INDENTURE dated as of December 1, 1998, is delivered
pursuant to Section 4.11 of the Indenture dated as of August 15, 1997 (as
heretofore or hereafter modified and supplemented and in effect from time to
time, the "1997 Indenture") among OUTDOOR COMMUNICATIONS, INC., a Delaware
corporation, certain of its subsidiaries (the "Guarantors") and FIRST UNION
NATIONAL BANK, a national banking corporation, as Trustee (the "Trustee") (all
terms used herein without definition having the meanings ascribed to them in the
1997 Indenture).

         The undersigned hereby agrees that:

         1. The undersigned are Guarantors under the 1997 Indenture with all of
the rights and obligations of the Guarantors thereunder.

         2. The undersigned have granted, ratified and confirmed, in the form
and substance of Exhibit B to the 1997 Indenture, the Guarantee provided for by
Article XI of the 1997 Indenture.

         3. The undersigned hereby represent and warrant that the
representations and warranties set forth in the 1997 Indenture, to the extent
relating to the undersigned as Guarantors, are correct on and as of the date
hereof.

         4. All notices, requests and other communications provided for in the
1997 Indenture should be delivered to the undersigned at the following address:

            Keith A. Istre
            Vice President - Finance and
            Chief Financial Officer
            Lamar Advertising Company and its Subsidiaries
            5551 Corporate Blvd.
            Baton Rouge, LA 70808

         5. A counterpart of this Supplemental Indenture may be attached to any
counterpart of the 1997 Indenture.

         6. This Supplemental Indenture shall be governed by and construed in
accordance with the internal laws of the State of New York.



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         IN WITNESS WHEREOF, the undersigned have caused this Supplemental
Indenture to be duly executed as of the day and year first above written.

                                   Guarantors:

                                   LAMAR ROBINSON, INC.


                                   By:  /s/ Kevin P. Reilly, Jr.
                                        ----------------------------------------
                                        Kevin P. Reilly, Jr., President

Attest:

By:  /s/ Charles W. Lamar, III
   ------------------------------------
   Charles W. Lamar, III, Secretary

Accepted:

FIRST UNION NATIONAL BANK,
as Trustee

By:  /s/ Shawn K. Bednasek
   ------------------------------------
Title:  Vice President
      ---------------------------------




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                  SCHEDULE OF ADDITIONAL SUBSIDIARY GUARANTORS




                         Guarantor                                                Execution Date
                         ---------                                                --------------

                                                                               
            Lamar Advertising of Kentucky, Inc.                                      2/01/99

             Lamar Advertising of Roland, Inc.                                       3/01/99

                   Colorado Logos, Inc.                                              5/27/99

                  Lamar Tennessee, L.L.C.                                            6/29/99

                  New Mexico Logos, Inc.                                             7/02/99





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