Concrete Turns Green, Figuratively Speaking

Current permeable interlocking concrete pavements (PICPs) design accommodates more frequent and heavier vehicle loading than earlier permeable pavements. As a result, PICP applications have expanded to include streets, walkways, driveways, large commercial parking areas, alleys, and roadway shoulders. New PICPs also address a number of other issues, such as water pollution and excess heat in surface waters. This article outlines the benefits of PICPs, lists factors in determining project suitability, and describes structural and hydrological design, construction considerations, and maintenance.