All emergency vehicles traveling the public streets of the city shall not travel at a speed greater than is reasonably safe under the circumstances when within the city and shall at all times when acting in an emergency, give audible signal by bell, siren or exhaust whistle and further by an authorized blinking red signal visible to the public.
('79 Code, § 23-30) (Ord. A-533, passed 12-14-64) Penalty, see § 70.99