No vehicle, unless specifically authorized by some other section of this code or by posted signs, shall be driven at a speed greater than 25 mph upon any street within the city. The Council may determine that certain other speed regulations shall be applicable upon specified streets in certain areas, in which event, it shall be unlawful for any person to drive a vehicle at a speed in excess of any speed so declared when signs are in place giving notice thereof.
(Prior Code, § 15-221) Penalty, see § 72.99