The chief of police, subject to any directions which the city commission may give by motion or resolution, is hereby authorized and required to establish bus stops, bus stands, taxicab stands and stands for other passenger common carrier motor vehicles on such public streets in such places and in such number as he shall determine to be of the greatest benefit and convenience to the public; and every such bus stop, bus stand, taxicab stand or other stand shall be designated by appropriate signs. By the same authority, such stops and stands may be changed or discontinued. (2001 Code § 75.33)