(a) Streets shall intersect as nearly as possible at right angles and no street shall intersect any other at less than a seventy degree angle.
(b) Intersections shall have center line offsets of not less than 200 feet.
(c) Right-of-way lines at street intersections shall be rounded with a radius of not less than twenty-five feet.
(d) Intersection sight distance standards shall be provided at all intersections of subdivision streets with existing highways as follows: intersections with arterial and collector streets, 350 feet; with local streets 235 feet.