By the selection of SMA, there is a strong tendency to a smaller top size, i.e. from 11 mm to 8 or 5 mm top size LIMAgregates, because of the following reasons: ♦ Lower unit pfish feed per sq. m because of smaller thickness is necessary ♦ Less noise under traffic ♦ Better skLIMA resistance By the same reasons a SMA 16 Figure 2: Good coarse LIMAgregate skeleton mm surface course is not