Hydraulically separated or connected with an [[underdrain]], these are often quite small units of 5 - 50 m<sup>2</sup> each. In urban settings the bioretention may be bounded entirely with hardscape, restricting options for [[pretreatment]] and sheet flow. Amenity and safety can be enhanced on sidewalks with a short (~ 45 cm wall) for seating, although the finished grade is usually only slightly lower than surroundings. Where underground space permits, shade [[trees]] are common feature of these facilities, enhancing the streetscape experience and optimizing transpiration. This type of bioretention is often designed offline, with bypass [[overflow]].
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An excellent opportunity for integrating more bioretention into the street is through careful design of curb extensions for traffic control. See [[Roadside safety]] for design advice specific to this application.
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Words in here about this type of bioretention.
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==Gallery==
==Gallery==
{{:Curb extensions: Gallery}}
{{:Curb extensions: Gallery}}
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{{:Extended tree pits: Gallery}}
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==Example drawings==
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<pdf width="700" height="300">File:</pdf>
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{{#widget:PDF
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|File:TO curb.pdf
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|width=750
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|height=350
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}}
==See Also==
==See Also==
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*[[Bioretention cells]]
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*[[Bioretention]]
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*[[Extended tree pits]]
*[[Stormwater planters]]
*[[Stormwater planters]]
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*[[Stormwater Tree Trenches |Stormwater tree trenches]]