A. No vehicle shall be driven at a greater speed than twenty-five (25) miles per hour upon any street or highway within the City except:
1. Emergency vehicles being lawfully driven as provided in this Code; or
2. When a different speed limit is otherwise designated and posted.
B. The City Manager may reduce or increase the speed limits provided in this Code by the appropriate placement of signs on such streets or parts of streets indicating a lower or higher speed limit.
(Code 1991, § 15-401)