430.04 DESIGNATION OF AND STOPPING AT ARTERIAL STREETS.
   (a)   The following streets within the City are hereby declared to be arterial streets:
      (1)   Illinois Street (Federal Highway No. 30) from the eastern corporate limits to the western corporate limits of the City;
      (2)   Tenth Avenue from Illinois Street south to its junction with Eleventh Avenue and Eleventh Avenue south to the southernmost City limits (State Highway No. 19-City Route);
      (3)   Thirteenth Avenue from Cedar Street to Lodgepole Road;
      (4)   Cedar Street from Thirteenth Avenue to Seventeenth Avenue; and
      (5)   Seventeenth Avenue from Grant Street to Ash Street.
   (b)   Such arterial streets described above shall be marked at the corners of the intersections with the streets crossing them by signs bearing the word "STOP." Unless otherwise directed by an automatic traffic signal, no driver of any vehicle, before entering any intersection of such arterial street, shall fail to come to a complete stop, and, after having come to such stop, to proceed into such intersection until such movement can be made in reasonable safety, consideration being given to the condition of traffic on such arterial street.
(1958 Code § 16.35)