United States Department of Transportation
i
Performance of a porous pavement system on the Maine Mall Road in South Portland.
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2010-12-01
[PDF-1.09 MB]
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Abstract:Porous pavements have been successfully used by developers since the mid-70’s as a means to make
traditional impervious facilities, such as parking lots, handle storm water in a more environmentally
friendly way. Traditional pavement materials used in these facilities can create storm water run off
problems such as erosion of adjacent surfaces and poor water quality of downstream watersheds. Porous
pavement actually allows storm water to seep into the subsurface, typically a stone reservoir and sand
filter, and dissipate into the underlying substrate. Porous pavement systems provide an effective surface
for vehicle traffic while also providing storm water management that improves water quality. Some
studies have shown that these systems have a high removal rate of total suspended solids, metals, oils and
grease, and other harmful contaminants. Other benefits are a “cooling” effect of the storm water and a
reduction in demand on the storm sewers. The surface can consist of either an asphalt pavement or
concrete pavement material that meets the public expectations for smoothness while allowing excellent
drainage into the underlying collection system.
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