® Wearing surface: 20-25 cm Portland cement or 2-8 cm asphaltic concrete
® Base: 5-10 cm asphaltic concrete, 15—30 cm sand-gravel base, 20-30 cm
soil-cement, or 15-20 cm asphalt stabilized sand.
@ Subbase material (this layer may be omitted): 15-30 cm sand-gravel.
® Subgrade: The natural soil at the site. The top O.15—0.5 m is usually
compacted prior to the placement of the other layers of the pavement.