This document discusses methods for constructing waterproof roads. It describes various materials that can be used for waterproofing cement concrete roads and bituminous roads, including calcium stearate, rubber crumbs, and paving fabrics. Rubber crumbs are obtained from recycling waste tires and added to bitumen to improve strength and stability while addressing environmental issues. Paving fabrics are laid with hot asphalt between road layers to create a waterproof and stress-absorbing bonded interlayer that prevents cracking when placed under an asphalt overlay.