Okla. Stat. tit. 66, § 125c

The public authorities, or the political subdivision of the state, having jurisdiction and control over any public highway or street in which such barricading device is constructed or installed, maintained and operated, may expend public funds to pay the cost and expense thereof; provided, however, that the parties in interest may agree in writing otherwise. Laws 1937, p. 399, § 3, emerg. eff. May 25, 1937.