Okla. Stat. tit. 69, § 69-4023: Erection and maintenance of signs - Responsibilities of

contractor.

The Department of Transportation shall contract to erect and

maintain, on the right-of-way of interstate and controlled access

highways, logo signs informing the public of gas, food, lodging and

camping facilities. The contractor shall furnish, install,

maintain, and replace signs for the benefit of advertisers who

provide gas, food, camping and lodging facilities for the general

public, and lease advertising space on the sign to operators of

these facilities.