373.12   RIDING ON ROADWAYS; PATHS.
   (a)   Wherever a usable path for bicycles or motorized bicycles has been provided adjacent to a roadway, bicycle and motorized bicycle riders shall use the path and shall not use the roadway.
   (b)   Whoever violates 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.