Roads, wherever they are, represent major public investment and for this reason are expected to last for a long time. Rapid increases in the number of vehicles and thus a rise in traffic volumes and axle loads produce congestion, wear and tear on structures, along with air pollution and noise emissions. The materials used to construct modern roads, from the sub-base upwards to the asphalt or concrete wear surface have improved vastly over the years, as has the equipment involved. In the Netherlands, Kuiken,