Permeable interlocking concrete pavement (PICP) allows water to infiltrate between the paver joints filled by small stone aggregate. An open-graded base is most often used because it offers greater water storage capacity, typically 30 to 40 percent. PICP can meet the LEED credit requirements for sustainability.

Porous asphalt contains no fine aggregate particles, thus creating spaces in the pavement for water to drain.

Pervious concrete is made with exacting proportions of water and cementitious materials to form a thick paste-like coating over aggregate material. Because there is little or no sand in the mix, it is 15 to 25 percent porous.

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