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<poem>
<poem>
Curb cuts are a form of LID/BMP [[Inlets|inlet]].
Curb cuts are a form of LID/BMP [[Inlets|inlet]]. They include a variety of modified curbs and spillways.
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 width increases rapidly on steeper roads.
As this inlet width is directly proportional to longitudinal slope; the required curb cut width increases rapidly on steeper roads.
!From asphalt catchment
!From asphalt catchment
!From concrete catchment
!From concrete catchment
!From either asphalt or concrete catchment
|-
|-
|30 - 45 deg
|30 - 45 deg
|605.020 <ref name =OPSD>http://www.roadauthority.com/Standards/?id=b00e3771-6095-4257-b029-1d9879418039</ref>
|605.020 <ref name =OPSD>http://www.roadauthority.com/Standards/?id=b00e3771-6095-4257-b029-1d9879418039</ref>
|605.010 <ref name =OPSD/>
|605.010 <ref name =OPSD/>
|605.040 Asphalt Spillways <ref name =OPSD/>
|-
|-
|90 deg
|90 deg
|604.020 <ref name =OPSD/>
|604.020 <ref name =OPSD/>
|604.010 <ref name =OPSD/>
|604.010 <ref name =OPSD/>
|605.040 Asphalt Spillways <ref name =OPSD/>
|}
|}
==Sizing==
==Sizing==
To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width<ref>U.S. Department of Transportation, Federal Highways Administration. 2013. “URBAN DRAINAGE DESIGN MANUAL.” https://www.fhwa.dot.gov/engineering/hydraulics/pubs/10009/10009.pdf.[[File:USFHWA 2009.pdf|view here]]</ref>::
To completely capture linear flow travelling along a gutter perpendicular to a curb inlet, the inlet must be of width<ref>U.S. Department of Transportation, Federal Highways Administration. 2013. “URBAN DRAINAGE DESIGN MANUAL.” https://www.fhwa.dot.gov/engineering/hydraulics/pubs/10009/10009.pdf.[[USFHWA 2009.pdf]]</ref>::
<math>W_T=0.817Q^{0.42}S_{0}^{0.3}\left (\frac{1}{nS_{x}}\right)^{0.6}</math>
<math>W_T=0.817Q^{0.42}S_{0}^{0.3}\left (\frac{1}{nS_{x}}\right)^{0.6}</math>
{{:Curb cuts: Gallery}}
{{:Curb cuts: Gallery}}
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[[category: modeling]]
[[category: Calculations]]