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Curb cuts are a form of BMP [[Inlets|inlet]].
Curb cuts are a form of BMP [[Inlets|inlet]].
They are well suited to retrofit scenarios and to collect runoff from catchments with relatively gentle longitudinal slope, and/or a greater cross slope. This might be the local topography of a parking lot or a piece of parkland?
They are well suited to retrofit scenarios and to collect runoff from catchments with relatively gentle longitudinal slope, and/or a greater cross slope. This might be the local topography of a parking lot or a piece of parkland?
As this inlet width is directly proportional to longitudinal slope; the required curb cut increases rapidly on steeper roads.
As this inlet width is directly proportional to longitudinal slope; the required curb cut increases rapidly on steeper roads.
'''Standard width (450 mm), as included in OPSD drawings is often undersized for LID applications'''
For reference, the OPSD collection of standard drawings includes:
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{| class="wikitable"
|-
!Flow direction
!From asphalt catchment
!From concrete catchment
|-
|30 - 45 deg
|605.020 <ref name =OPSD>http://www.roadauthority.com/Standards/?id=b00e3771-6095-4257-b029-1d9879418039</ref>
|605.010 <ref name =OPSD/>
|-
|90 deg
|604.020 <ref name =OPSD/>
|604.010 <ref name =OPSD/>
|}
==Sizing==
==Sizing==