Patent ID: 7686540

Claim:
A roadway or other transport corridor infiltration system comprising: at least the edge surface of the roadway or other transport corridor being formed by a grid structure formed by a plurality of plastics grid modules, each having one surface formed by a plurality of arrays of alternate parallel elongated openings and support members with each array being orientated 90° to adjacent arrays, a peripheral wall which extend downwardly below the arrays to form a skirt, and having transverse web members located beneath the support members running normal to the support members and connecting with the adjacent transverse web member of adjacent arrays, such that water can permeate therethrough; an infiltration layer, located at least below and in communication with said grid structure, filled with aggregate material, which is larger in cross-section than the width of the elongated openings of the grid structure, whereby the peripheral skirt of the grid rests on the infiltration layer forming an air gap between the infiltration layer and the arrays of the elongated support members and elongated openings; and a water permeable plastics infiltration tank located below and in communication with said infiltration layer, such that runoff passes through the grid structure into the infiltration layer and into the permeable infiltration tank, where the water is stored and/or flows back into the soil through the walls of the tank.