It shall be unlawful for any person to operate any motor vehicle along or upon any street or highway within the limits of the City of Linton, at a greater speed than:
(A) Twenty-five (25) miles per hour in any business district of the City of Linton, Indiana;
(B) Twenty-five (25) miles per hour in any residential district of the City of Linton, Indiana;
(C) Twenty (20) miles per hour in the School district of the City of Linton, Indiana;
(D) Fifteen (15) miles per hour in any park or alley within the City of Linton, Indiana;
unless otherwise marked.