Okla. Stat. tit. 47 § 15-131
Upon application by the governing board of a public trust, as defined in Sections 164 and 176 of Title 60 of the Oklahoma Statutes, the Transportation Commission may set speed limits and promulgate regulations governing uniform traffic control to comply with the provisions of Title 47 of the Oklahoma Statutes for the reasonable and safe operation of motor vehicles on property situated within the state and owned by or under the control of the public trust.
Speed limits and regulations so established shall be enforceable when appropriate signs giving notice thereof are erected. The cost of such signs shall be borne by the public trust. Any person driving on such property in violation of the speed limit or regulation so established shall, upon conviction, be punished in the same manner as provided for persons convicted of violating other provisions of Sections 11-101 et seq. of Title 47 of the Oklahoma Statutes.
Okla. Stat. tit. 47, § 15-131