The streets, or portions thereof, of the city are declared to be and they are divided and classified into three groups, and shall henceforth be known as and regulated as to heavy traffic by the name of such three groups, together with regulations appertaining thereto as hereinafter set forth in this section. Such groups are designated as: "unrestricted streets"; "restricted streets"; and "specially identified restricted streets."
(Prior code § 3311.01)