The driver of any motor vehicle which has been checked by radar, or by any electrical or mechanical timing device to determine the speed of the motor vehicle over a measured distance of the highway and found to be in violation of any of the provisions of Section 333.03 may be arrested until a warrant can be obtained, provided such officer has observed the recording of the speed of such motor vehicle by the radio microwaves, electrical or mechanical timing device, or has received a radio message from the officer who observed the speed of the motor vehicle recorded by the radio microwaves, electrical or mechanical timing device; provided, in case of an arrest based on such a message, such radio message has been dispatched immediately after the speed of the motor vehicle was recorded and the arresting officer is furnished a description of the motor vehicle for proper identification and the recorded speed. (Ord. 89-1973. Passed 6-18-73.)