The designer shall measure the shoulder widths and specify the maximum and minimum to ensure proper quantity calculations and to assure that the full width is stabilized by the addition of stone. The existing and available shoulder widths are to be preserved. On projects where shoulder widths are predominantly less than two feet, the shoulders should be paved and edge striping is to be placed at the previous pavement edge. Correcting of ditch depth is in the interest of safety, but flowline of ditches should be maintained to provide a minimum 6 of freeboard for effective road drainage. Shoulders can become too steep by successive resurfacing, erosion, or ditch cleaning operations and should be restored to an appropriate slope.
Shoulders are to be restored with stone or pavement to a height equal to the finished roadway.
The intent of this detail is to assure, during resurfacing operations, proper treatment of driveways and side roads to maintain safe vehicle operation on the main road. The intent is not to pave every unpaved approach. It is the designer's responsibility to recognize existing and potential problem approaches they are to be listed in the table provided and included in the contract documents. If more space is required, additional tables shall be provided. All problem approaches shall be documented with proper justification in the project file.