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• f. No street surface shall have a finished grade of less than one-half of one percent in order <br /> to ensure adequate drainage. <br /> g. Subject to planning commission approval, street grades may be increased above the <br /> maximum grades stated in this section by not more than two percent and not to exceed 200 <br /> feet in any contiguous segment. Average (positive or negative) grade of the entire street <br /> segment shall not exceed the stated requirements. <br /> (7) To ensure adequate sight distance on curves,the minimum centerline radii for horizontal curves <br /> shall be as follows: <br /> a. Arterial streets, 600 feet. <br /> b. Collector streets,300 feet. <br /> c. Residential streets, 100 feet. <br /> d. Minor residential streets, 75 feet. <br /> (8) Between reverse curves a tangent of not less than 200 feet for arterial streets and 100 feet for <br /> collector streets shall be required. This requirement may be modified by the planning <br /> commission for residential streets where topography or other conditions makes such a <br /> modification desirable for maintaining a suitable layout. <br /> (9) For intersections and alignment: <br /> a. Street intersections shall be laid out as nearly at right angles as possible and may be <br /> curved to bring this about. The centerline of no more than two streets shall intersect at any <br /> one point.No intersection shall be at an angle of less than 75 degrees. <br /> b. Where collector or arterial streets intersect other collector or arterial streets,the curb radii <br /> at the intersection shall not be less than 31 1/2 feet. Where residential streets intersect with <br /> other residential, collector or arterial streets, the curb radii at the intersection shall be not <br /> less than 25 feet. <br /> C. Street jogs with centerline offsets of less than 125 feet shall be avoided. Proposed new <br /> intersections along one side of an existing street shall,whenever practicable, coincide with <br /> any existing intersections on the opposite side of the street. <br /> d. Intersections shall be designed with grades as level as possible consistent with proper <br /> provision for drainage. In approaching intersections, the leveling area shall have a grade <br /> not exceeding five percent for a distance of not less than 30 feet measured from the nearest <br /> curb or edge of the pavement. <br /> e. Additional street paving and right-of-way in the form of turning lanes shall normally be <br /> required along arterial streets at intersections with other arterial or collector streets. <br /> f. Property line comers at street intersections shall be rounded with a radius of at least 20 <br /> • feet. <br /> - 168 - Batesville Subdivision Regulations <br />