(A) No person shall drive a vehicle within the City of Osakis at a rate of speed in excess of 30 mph.
(B) Provided, however, that at any place within the city where a higher or lower speed limit has been duly and lawfully indicated with appropriate traffic devices, no person shall drive a vehicle in excess of the rate so set.
(1986 Code, § 701.04) Penalty, see § 10.99