Okla. Stat. tit. 69, § 4001

It is hereby declared to be the policy of the State of Oklahoma that safe, adequate and efficient transportation facilities at reasonable cost to the people are essential to the economic growth of the state and the well-being of its people. The planning and development of such facilities shall be coordinated by a State Department of Transportation with overall responsibility for balanced transportation policy and planning. It shall not be the policy of the state to interfere with or hamper in any way the development of local transportation systems or projects to serve the peculiar needs of local communities.