If a violator of the restrictions on stopping, standing, or parking under the traffic laws or ordinances does not appear in response to a traffic citation affixed to such motor vehicle within a period of five days the clerk of the traffic court shall send the owner of the motor vehicle to which the traffic citation was affixed a letter informing him of the violation and warning him that in the event such letter is disregarded for a period of five days a warrant of arrest will be issued. (Ord. 210 § 154, 1957)