For highways outside of cities, infiltration within a right of way (ROW) may be one of the few means of meeting the return to predevelopment hydrology requirement under the Energy Independence and Security Act of 2007 (EISA). Right now, hydraulic design procedures for highways focus on the design of channels to convey stormwater runoff away from roads, but are not intended to assist with the design of ROWs for infiltration. Tasks for developing such a design process may be expected to include: (1) determining a process to incorporate a discharge-based means to quantify the runoff from the roadway surface (as differentiated from the static depth-based means currently in use for best management practices); (2) dividing the surface of an ROW into a rectangular grid to enable geospatial calculations; (3) developing a calculational strategy accounting for the simultaneous processes of stormwater running onto a pixel, infiltrating from that pixel and the remainder flowing on to the next downslope pixel; (4) developing a means to track the subsurface flow from the infiltration; (5) determining how to “collect” the infiltrated water that may flow into a drainage channel; and (6) converting infiltration and flow results into a required width for an ROW. There are additional policy issues that have technical implications (e.g., whether precipitation falling on the ROW must also be infiltrated in order to show compliance) that must also be addressed.