22356. (a) Whenever the Department of Transportation, afterconsultation with the Department of the California Highway Patrol,determines upon the basis of an engineering and traffic survey onexisting highway segments, or upon the basis of appropriate designstandards and projected traffic volumes in the case of newlyconstructed highway segments, that a speed greater than 65 miles perhour would facilitate the orderly movement of vehicular traffic andwould be reasonable and safe upon any state highway, or portionthereof, that is otherwise subject to a maximum speed limit of 65miles per hour, the Department of Transportation, with the approvalof the Department of the California Highway Patrol, may declare ahigher maximum speed of 70 miles per hour for vehicles not subject toSection 22406, and shall cause appropriate signs to be erectedgiving notice thereof. The Department of Transportation shall onlymake a determination under this section that is fully consistentwith, and in full compliance with, federal law. (b) No person shall drive a vehicle upon that highway at a speedgreater than 70 miles per hour, as posted. (c) This section shall become operative on the date specified insubdivision (c) of Section 22366.