Street Design Manual

Page

Reference

Text

5 Article 2.2 Travelway

A.    On-Street Parking - Parking within the ROW, typically adjacent to a curb, accommodates automobiles, bicycles or other vehicles. Parallel orientation is most common, though angled (head in and back in) parking may be used to provide additional spaces where sufficient ROW exists and off-street parking capacity is very limited. The presence of on-street parking encourages lower vehicular travel speeds on streets and buffers pedestrians from moving traffic. In certain street typologies, permeable pavement can be incorporated into street parking areas, and bioretention can be incorporated into corner bulb-outs at intersections and curbside extensions/bump-outs. B.    Gutter and/or Shoulder - The choice between gutter and shoulder for transitioning from Travelway to Streetscape depends primarily on area drainage characteristics, environmental sensitivity, land use intensity, and aesthetic intent. For most street typologies, a cross-section supporting more urban development involves the use of curb and gutter. Variations on traditional gutter and/or shoulder designs can be used to incorporate GSI elements. See Section 12.4, Curb and Gutter, for more detail on curb and gutter design. Applicable GSI practices include curb extensions/bump-outs and intersection bulb-outs, which are incorporated into the gutter, shoulder, or other transition, and bioswales, which can take the place of traditional curb and gutter in some applications. Permeable pavement also can be appropriate for use in the shoulder. C.    Median - Medians can range in width depending on street type and context. They may accommodate integrated turn lanes, pedestrian refuges at cross-streets and mid-block, drainage swales, shade trees, promenades, transit lines and stations. If space permits, landscaped medians provide a beneficial aesthetic and street narrowing effect in almost any context. Medians are conducive to the use of GSI elements that can offer several benefits. Depressed medians can be designed as bioretention islands or vegetated/bioswales that incorporate curb cuts to allow runoff to pass from gutters or other conveyance to these depressions. Alternatively, rock swales can be incorporated in medians where growth and/or maintenance of vegetation may be difficult. Permeable pavement also can be installed in medians as an alternative to conventional, impervious pavement, where the use of vegetation is not suitable.

Article 2.2 Travelway

Article 2.2 Travelway

8 Section 3.2.1 Sensitive Area Streets 

In areas of Raleigh where stormwater does not drain into pipe systems , other forms of drainage must be provided.