Admin Order 58-16-01 - Laserfiche WebLink

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at least a 30 -foot inside radius and a 50 -foot outside radius for emergency vehicle turning movements between the opposing curbs. The Owner/Developer shall provide sufficient right-of-way for sidewalk access ramps and sidewalk using the appropriate curb radius within the scope of their project. See Section 2.03 for the design requirements for sidewalks and access ramps. G. Curves, Horizontal and Vertical Horizontal and Vertical curves shall be of sufficient length to provide safe stopping sight distances (SSD) based on design speeds and rate of vertical curvature (K) as determined by the City Traffic Engineer and AASHTO road design standards (use "rounded for design" values of stopping sight distance). On hillside residential streets, deviations from the horizontal and vertical AASHTO standards may be allowed by the City Traffic Engineer when conformance to AASHTO standards is not attainable due to physical conditions and the Owner/Developer provides and installs MUTCD approved traffic control devices that provide safe and efficient operation of vehicles for the proposed street design. For crest vertical curves, the hill shall be signed with appropriate MUTCD warning signs and speed advisory plates. (See Section 2.07 Traffic Control Devices for more information.) H. Design Parameters: Speeds, Rates of Vertical Curvature, and Safe Stopping Sight Distances Design parameters for classified streets shall be: Classification Design Speed (mph) Minimum Rate of Vertical Curvature, K (ft/%) Minimum Safe SSD (ft) Crest Sag Access lanes 15 3 10 80 Residential streets with slopes greater than 6% 25 12 26 155 Residential streets 30 19 37 200 Collectors 35 29 49 250 Arterials 45 61 79 360 Public Improvement Design Standards Manual, 2016 Page 2-20