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(3) Streetsparallel to the railroad w•ntersectin a street which crosses the railroad at a shall be at a distance of at least 150 feet g 0 from the railroad right-of-way.Such distance shall be determined with due consideration of the minimum distance required for future separation of grades by means of appropriate approach gradients. (4) Streets crossing the railroads shall be avoided. (c) Intersections. (1) Streets shall be laid out so as to intersect as nearly as possible at right angles.A proposed intersection of two new streets at an angle or less than 75 degrees shall not be acceptable. An oblique street should be curved approaching an intersection and should be approximately at right angles for at least 100 feet from the intersection. Not more than two streets shall intersect at any one point unless specifically approved by the city. (2) Proposed new intersections along one side of an existing street shall coincide with any existing intersections on the opposite side of such street. Intersection jogs with centerline offsets of less than 150 feet shall not be permitted, except where the intersected street has separated dual drives without median breaks at either intersection.Where streets intersect major streets,their alignment shall be continuous.Intersections of arterial roadways shall be at least 800 feet apart. (3) Minimum curb radius at the intersection of two local streets shall be at least 15 feet, and minimum curb radius at an intersection involving a collector street or local streets in a commercial or industrial area shall be at least 25 feet.Alley intersections and abrupt changes in alignment within a block shall have the corners cut off in accordance with standard engineering practice to permit safe vehicular movement. (4) Intersections shall be designed with a flat stopping area of at least 30 feet in a residential area and 60 feet in a commercial or industrial area.The stopping area shall be designed to provide a maximum grade of two percent. (5) Where any street intersection will involve earth banks or existing vegetation inside any lot corner that would create a traffic hazard by limiting visibility,the subdivider shall cut such ground and/or vegetation(including trees) in connection with the grading of the right- of-way to the extent deemed necessary by the city to provide an adequate sight distance. (6) The crown of all streets,including intersections,shall be three percent or less. (d) Typical section. The typical section indicated in this subsection is as determined for a clay subgrade (A-6 soil classification) and may be subject to change.Soil borings may be required to be determined by the city. (1) Private street,residential I Units R.O.W.* M.P.W.** Section (feet) (feet) 3-6 50 24 8-inch class 5 100%crushed 3-inch 2341 bituminous surface Over 7 50 28 78-inch class 5 100%crushed 3-inch 2341 bituminous surface (2) Public street,residential Units R.O.W.* M.P.W.** Section (feet) (feet) 3-10 50 28 8-inch class 5 100%crushed 3-inch 2341 bituminous surface Over 10 50 32 8-inch class 5 100%crushed 3-inch 2341 bituminous surface Maximum cul-de-sac length=1,000 feet Maximum number of units on cul-de-sac=10 (3) Public street,commercial or industrial Page 19