Street Design Manual

3.2.1 A - Sensitive Area Parkway A Sensitive Area Parkway would be most appropriate as a high volume regional connector road where surroundings are primarily conservation or agricultural land. Multiuse trails on both sides of the street is a preferred way to accommodate pedestrians and cyclists. Ideally, both trails and shoulders are installed. Express transit service may be implemented on Sensitive Area Parkways. Sensitive Area Parkways 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.

Raleigh Street Design Manual – Page 9