(A) Subject to the provisions of § 70.58, the Board of Public Works and Safety is authorized to erect signs indicating no parking upon any street when the width of the roadway does not exceed 20 feet, or upon one side of a street, as indicated by those signs, when the width of the roadway does not exceed 30 feet.
(B) When official signs prohibiting parking are erected upon narrow streets as authorized herein, no person shall park a vehicle upon any such street in violation of that sign.
('71 Code, § 74.15) Penalty, see § 70.99