Street Design Manual

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11 3.2.1 C - Sensitive Area Residential Street

Sensitive Area Residential Streets are installed in places where natural runoff water drainage is preferred, and traffic volume is relatively low. Typically, this type would be used in an agricultural or primarily low-density residential setting. Sidewalk is required on both sides of the street. Sensitive Area Residential Streets are conducive to the use of GSI practices. Per UDO Article 9.5, where development impervious cover is more than 24% in any Secondary Water Supply Watershed Protection Area, the first inch of rainfall from the streets must be managed with use of GSI, unless a design exception is approved by the City. In these Protection Areas, permeable pavement may be appropriate for multiuse trails, bioswales and bioretention areas may be appropriate as alternatives to conventional drainage ditches, and combinations of trees and native vegetation may be appropriate as an alternative to conventional tree lawns. Neighborhood Yield is an unstriped two-way street accommodating parallel parking on one side. Neighborhood Yield streets operate best under low speed and volume conditions, giving opposing vehicle drivers the time and space necessary to successfully negotiate potential conflicting movements and serving no more than 40 units and no longer than ½ mile. Sidewalks are required on both sides of the street. Items in the amenities zone such as streetlights and trees should be installed at a pedestrian scale so as to provide a high level of comfort for residents and non- motorized street users. Neighborhood Yield is conducive to the use of GSI practices including curbside bioretention and permeable pavement in sidewalks. Neighborhood Local Streets are used in primarily residential developments serving from 41 and up to 150 residential units and no longer than ½ mile. They accommodate on-street parallel parking on both sides and feature two general travel lanes for vehicular use, including automobiles, bicycles, and occasional local transit or freight vehicles. Sidewalks are required on both sides of the street. Traffic calming design elements such as intersection bulb-outs and curb extensions/bump-outs can help moderate vehicle speeds on Neighborhood Locals, which are conducive to use of GSI practices including curbside bioretention, bioretention in bulb-outs and/or curb extensions, and permeable pavement sidewalks.

13 3.2.2 A - Neighborhood Yield

14 3.2.2 B - Neighborhood Local