Porous asphalt pavements are being used to reduce or eliminate storm water runoff from parking lots and other facilities. A porous asphalt pavement is constructed over a stone filled reservoir to collect and store storm water and to allow it to infiltrate into the soil between rainfalls. These designs can reduce pollution and replace expensive detention and treatment facilities. Porous Pavement systems are rapidly gaining favor with designers and regulators as an economical approach to storm water management for sustainable or low-impact development. As the NPDES permit requirements have become more widely applicable, it has become necessary that developers find more innovative means of compliance. Porous pavement systems are commonly being used as part of a strategy to obtain Leadership for Energy and Environmental Design (LEED) certification for green building projects.
A porous asphalt pavement design manual, IS-131, is available from the National Asphalt Pavement Association (NAPA) at www.hotmix.org/catalog/
While there you'll want to view the information in the porous pavement on-line library
Additional resources on porous pavement in stormwater management are available at
Another excellent article, " Porous Asphalt Pavement with Recharge Beds" is available at http://www.forester.net/sw_0305_porous.html
Sample specifications for the asphalt materials for the porous pavement surface and base courses follow:
Porous Asphalt Pavement Surface Course (Rev. 12September2012)
Porous Asphalt Pavement Base Course
FHWA Technical Advisory, Open Graded Friction Courses (T 5040.31) (Dec. 26, 1990)
Other information is available at the "International Stormwater Best Management Practices Database"
For more information and articles view the following PDFs:
Asphalt-the Right Choice for Porous Pavements
Lenexa, Kansas Tries Porous Asphalt on for Size
Thinking Green with Porous Asphalt
NAPA Porous Pavement Presentation Slides