Okla. Stat. tit. 69 § 901
The Commission shall pay the cost of or perform the act of constructing, improving or maintaining municipal streets where such streets are a continuation of the state or federal highway system and the cost of installation, repair and maintenance of signs and lane marking for municipal streets where such streets are a continuation of the state or federal highway system. The Commission shall not pay the cost of mowing the right-of-way; drainage systems and facilities; or curbs, sidewalks or driveways of any such street. When a municipality performs construction or maintenance operations within the right-of-way which affects or involves the removal of the surface, grade or subgrade of the highway, the municipality shall, at the expense of the municipality, restore the surface, grade or subgrade of the highway in accordance with the standards and specifications set forth by the Department of Transportation. If the municipality fails to restore the surface, grade or subgrade of the highway in accordance with the standards and specifications set forth by the Department of Transportation, the Department of Transportation shall restore the highway and charge the municipality for all expenses associated therewith. The Commission may participate in or pay the cost of lighting and electronic traffic control devices for municipal streets where such streets are a continuation of the state or federal highway system.
Okla. Stat. tit. 69, § 901