The article provides guidelines for designing drainage systems under highways. It focuses on draining water that seeps into the pavement shoulders. The design method includes analyzing inflow and outflow, using open graded drainage layers, collector drains, pipe outlets, and markers. Examples are given for embankment sections, cut sections, and superelevated curves. The report also covers joints, permeable surfaces, medians, and shoulders. The goal is to offer general guidance for designing, constructing, and operating subsurface drainage systems.