(A)   The City Council by resolution may, whenever necessary to preserve a free flow of traffic or to prevent accidents, designate any intersection as one where turning of vehicles to the left or to the right, or both, is to be restricted at all times or during specified hours.  No intersection on a trunk highway shall be so designated until the consent of the Commissioner of Transportation to the designation is first obtained.
   (B)   The city shall mark by appropriate signs any intersection so designated.
   (C)   No person shall turn a vehicle at any intersection contrary to the direction on those signs.
Penalty, see § 10.99