A Mechanical Concrete® sub base simply and ruggedly binds together granular soil and stone particles and spreads out heavy wheel loads over the subgrade. So it improves the overall performance of both paved and unpaved roads. Tire cylinder confinement effectively redistributes a truck wheel load over 3 to 6 times more area. Confinement more than triples the load supporting capacity of crushed stone, sand, and soils. So it does more with less, and it lasts longer; that means saving real money.