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

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SECTION 2 – STREETS, WALKWAYS & PATHS 10 utility facilities within alleyways or other public streets shall not conflict with service vehicle traffic, turning movements, and other property access provisions. 2-2.4 DESIGN SPEED The design speed of a roadway is the posted speed limit or the statutory required speed limit for streets without a posted speed limit. Table 2-2.4(1) below defines desired design speeds for each street classification within the City. Table 2-2.4(1) Classification Design Speed Arterial 40 mph Collector 30 mph Residential 30 mph Alley 15 mph If a posted speed is present, then the posted speed is the design speed. Based upon context and use, the City Engineer may determine and assign an alternate design speed as appropriate. 2-2.5 ROADSIDE SAFETY In compliance with the CSP, both new construction and spot improvements should “include facilities and amenities that are recognized as contributing to Complete Streets”, including lighting, trees, and other fixtures which are generally considered obstructions in terms of roadside safety. Streets within the City are generally curbed, have design speeds less than fifty (50) mph, and have minimal Right-of-Way. AASHTO makes provisions for curbed facilities, recommending obstructions be located as far from the traveled way as possible. At a minimum, roadside obstructions shall be three (3.00) feet behind the face of curb at intersections and driveway openings, and one and one-half (1.50) feet behind the face of curb elsewhere. Uncurbed facilities should comply with the AASHTO Roadside Design Guide. 2-2.6 SIGHT DISTANCE Stopping and intersection sight distance should be provided on all City streets in accordance with the Subdivision Ordinance and the IDM. A sight easement may be required for any portion of the sight triangle that falls outside of the Right-of-Way. 2-2.7 HORIZONTAL ALIGNMENT Horizontal alignment for subdivisions is subject to the Subdivision Ordinance. Alignment and horizontal curvature of other roadways shall typically comply with AASHTO’s design guidelines for Low Speed Urban Streets. Superelevation is not desired within the City and an effort should be made to design roadways that use a normal crown section. If a superelevated section is used, it should typically have a maximum rate of four percent (4%). For locations with reverse curves, a minimum tangent between curves of 100 feet for major streets and fifty (50) feet for minor streets is required, per the Subdivision Ordinance.