The minimum lot width for cul-de-sac lots or lots fronting on road curves shall be 40 feet. Said lots shall be provided a minimum building line width of not less than 60 feet and shall be located not less than 25 feet back from the front lot line as measured perpendicular to the front lot line or 55 feet from the centerline of the fronting street, whichever is greater. [Ord. 4107, § 6.04, 4-14-75.]