§ 474.06   RIDING BICYCLES UPON SIDEWALKS.
   A person operating a bicycle shall ride upon the sidewalk rather than the roadway when sidewalks are available, except that no person shall ride a bicycle upon a sidewalk upon or along which signs have been erected by authority of Council or other duly designated local authority prohibiting such bicycle riding, or within a business district.  At no time shall a person under the age of 11 years operate a bicycle on a street.