Street Design Manual

3.2.1 B - Sensitive Area Avenue A Sensitive Area Avenue is used in rural conditions where it provides important connectivity for multiple travel modes. It should not be used in a completely residential setting (see “Sensitive Area Residential Street” instead.) The Sensitive Area Avenue type provides great flexibility in accommodating future growth, and can be reconfigured to a “Main Street” cross-section within targeted development nodes if drainage facilities were upgraded. Sidewalk is required on both sides of the street. Sensitive Area Avenues 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 10