Where a deflection angle of more than 10 degrees in the alignment of a street occurs, a curve of reasonably long radius shall be introduced. On streets 60 feet or more in width, the center line radius of curvature shall not be less than 300 feet; on other streets not less than 100 feet. (Ord. 152 § 1, 1971; 1978 code § 15.108.14)