10.26.2021-SBN-Standards-Manufacturer-Additions-Minor-Revisions-final

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SECTION 2 – STREETS, WALKWAYS & PATHS 11 2-2.8 VERTICAL ALIGNMENT The maximum desirable grade on residential streets and alleys is eight percent (8%). On all other streets, the maximum desirable grade is six percent (6%). The minimum desirable continuous grade is 0.5%. Vertical curvature for sags and crests shall comply with AASHTO’s design guidelines, Chapter 302 (44) of the IDM, and the Subdivision Ordinance. Vertical curve length shall desirably be three times the design speed and rounded up to the nearest quarter station [twenty-five (25) feet]. Compound vertical curves are not desirable and should have a tangent section of not less than twenty-five (25) feet between points of vertical curvature. 2-2.9 SIDEWALKS AND CURB RAMPS Sidewalk is required to be installed per City Standards the width of the developed parcel, and extend to the property line. If the site is located on a corner requiring a curb ramp, the developer is responsible for installing curb ramps. This may include the replacement of existing sidewalk or curb ramps if not PROWAG compliant. Curb may be required to be replaced if in poor condition. Sidewalks should be considered for all projects within the Right-of-Way. When not integral to the curb, the minimum sidewalk width is five (5) feet. When there is less than twelve (12) inches of separation between the sidewalk and the curb face, the minimum sidewalk width is six (6) feet. Sidewalks shall be designed to have a maximum design cross slope of one and one-half percent (1.5%) and a maximum running grade of five percent (5%), unless running parallel to a steeper roadway, in which case the walk profile would run parallel to the roadway grade. Vertical discontinuities will be limited to 0.25 inches or less. All sidewalks shall have a broom finish unless an alternate finish is approved by the City Engineer. Expansion joints shall be placed at a maximum spacing of forty (40) feet. Expansion material is required at all cold joints. Transverse control joints at least one-quarter (¼) of the concrete depth shall be placed at intervals approximately equal to the width of the sidewalk. Repairs or replacement of sidewalk shall be made to the nearest joint and the existing joint spacing shall be maintained. Curb ramps are required on each side of each intersection where sidewalks are present on opposite sides of the street, in order to provide an accessible route as defined by PROWAG. Cross slopes at curb ramps shall be designed to not exceed one and one-half percent (1.5%). Ramp grades shall be designed to not exceed seven and one-half percent (7.5%). Where turning movements are required at the top or bottom of a curb ramp, a turning area with minimum dimensions of forty-eight (48) inches by forty-eight (48) inches shall be provided, with a maximum slope within the turning area of one and one-half percent (1.5%). Detectable warning elements are required at each curb ramp in accordance with the City’s Standard Drawings. Orientation of the detectable warning element should be perpendicular to the direction of pedestrian travel when located less than five (5) feet from the back of curb. Transverse grooving beyond the detectable warning shall not be applied to concrete curb ramps. Other design elements for the curb ramp design shall be in accordance with the City’s Standard Drawings, INDOT Standard Drawings, and PROWAG. Colored concrete for sidewalks, curbs, and curb ramps shall be in accordance with the requirements of 2-5.3 PCCP, COLORED. Detectable warning elements shall be a suitable contrasting color where colored concrete is applied.