Okla. Stat. tit. 69, § 69-1209: Removal of structures by highway commission

The Commission, its officers, agents, servants and employees

shall have authority to physically remove any such sign, post, thing

or structure, gasoline pump, driveway canopy, fence, signpost and

building; and if the owner of any such driveway canopy, gasoline

pump, or building, thing or structure fails to remove the same

within a reasonable time after written demand for the removal

thereof has been made upon him by registered mail or personal

service, the Commission, its officers, agents, servants and

employees may physically tear down and remove such building, canopy,

or pump, and for such purpose may enter upon private property to the

extent necessary to accomplish the removal. Neither the state nor

the Commission or its agents, servants, officers and employees shall

be liable for any damage caused or sustained by reason of the

abatement and removal of any such nuisance.