373.10  COMPLIANCE WITH TRAFFIC CONTROL DEVICES; RIGHT OF WAY.
   (a)   Any person operating a bicycle shall:
      (1)   Obey the instructions of official traffic control devices applicable to vehicles, unless otherwise directed by a police officer;
      (2)   Before changing course, turning or stopping upon a roadway, exercise due care that the movement can be made with reasonable safety and give the hand and arm signals required by Section 331.15;
      (3)   Yield the right of way to pedestrian and vehicular traffic upon the roadway as lawfully required;
      (4)   Yield the right of way to a pedestrian upon a sidewalk;
      (5)   Give timely and audible signal before overtaking and passing a pedestrian upon a roadway or sidewalk.
   (b)   Whoever violates any provision of this section is guilty of a minor misdemeanor on a first offense; on a second offense within one year after the first offense, the person is guilty of a misdemeanor of the fourth degree; on each subsequent offense within one year after the first offense, the person is guilty of a misdemeanor of the third degree.