Except as provided under Exceptions (a) and (b) of this section, it shall be unlawful, when authorized signs are in place giving notice thereof, to drive or propel any commercial vehicle which is designed, used or maintained primarily for the transportation of property for hire, compensation or profit, drawing a trailer or semitrailer, or to cause or allow any such commercial vehicle to be driven or propelled on the following named streets or portions thereof;
(1) Olympic Boulevard between Figueroa Street and the easterly city limits of the City of Beverly Hills.
(2) Olympic Boulevard between the westerly City limits of the City of Beverly Hills and Sepulveda Boulevard.
EXCEPTIONS:
(a) This section shall not prohibit such commercial vehicles from using said described streets or portions thereof, where necessary for the picking up or the delivery of goods, wares, merchandise or material.
(b) This section shall not apply to any vehicle which is subject to the provisions of Section 50 1/4 of the Public Utilities Act of California, nor to any taxicab or any other passenger vehicle operated for hire.