(a) 
The city council may alter the maximum speed limit of thirty (30) miles per hour, as established by V.T.C.A., Transportation Code, section 545.352, on any street or portion thereof within the city, and it shall be unlawful for any person to drive or operate any vehicle at a rate of speed in excess of such altered limit.
(b) 
Nothing in this code or the ordinance adopting this code shall be deemed to affect the validity of any ordinance establishing speed limits on specific streets or portions thereof, and all such ordinances are hereby recognized as continuing in full force and effect to the same extent as if set out in full in this code.
(1970 Code, sec. 29-94; 1988 Code, sec. 31-46)
Whenever this article or any other ordinance of the city modifies and alters the basic speed limit established in V.T.C.A., Transportation Code, section 545.352, the director of public works shall cause signs to be posted at the several locations giving notice thereof and no such modification and alteration shall be effective unless such signs are in place.
(1970 Code, sec. 29-95; 1988 Code, sec. 31-47)