An 8-foot shoulder area is required for state roadways. However, the shoulder can serve a variety of different functions.
Shoulder areas should be configured to serve a variety of Grand Boulevard- and transportation-related functions. They should be designed as an integral part of the improvement concept for the street and policies for frontage land use and development.
Figures 5-4a through 5-4f depict different improvement approaches:
Curbside parking is recommended for storefront commercial and mixed use frontages where allowed by roadway width, taking into account all roadway users (transit, bicycles, and automobiles). Where curbside parking is provided, time-limited or metered parking should be considered.
Locating street trees within parking zone planters is an option where sidewalks are narrow and unlikely to be widened; a minimum 4-foot clearance is required between the planter and the adjacent travel lane. Subsurface utility conditions must be determined. A structural soil trench, and, depending on local conditions, pervious paving, are recommended for the parking zone.
Incorporating “rain garden” bulb-outs and planters to capture and biofilter runoff is an option that can be combined with curbside parking; minimum 4-foot clearance to adjacent travel lane required.
Where roadway width allows, a combined bike lane/parking area is an option where bike lanes are desired in a storefront commercial or mixed use area (11 or 12-foot minimum depending on curb type).
A dedicated bike lane is an option for frontages that do not contain storefront commercial space; minimum 6-foot width recommended (1-foot gutter, 5-foot lane).
If roadway width allows, a lane divider with a roll curb is an option to provide bicyclist protection.