§ 73.31  RIDING IN SINGLE FILE.
   Persons riding bicycles upon a roadway shall ride in a single file:
   (A)   In business districts of the city;
   (B)   On through streets; and
   (C)   At other places upon order of any police officer, and in no event shall persons ride more than two abreast.
('80 Code, § 5-42)  Penalty, see § 70.99