The SMA mixes have been placed exclusively on high volume, high speed highway segments. Analyses of nearly 1000 sets of construction quality control test data and approximately 300 sets of pavement performance measurements for up to 10 years of service life conclusively demonstrate the superior performance of SMA mixes in Maryland. Cumulative total rut depth for SMA projects averaged 3.6 mm for 12.5 mm mixes and 3.3 mm for 19 mm projects. Cumulative IRI values averaged 1.2 m/km for 12.5 mm mixes and 1.5 m/km for 19 mm projects. Average friction numbers at the last survey were 49.1 for 12.5 mm mixes and 46.5 for 19 mm projects. mean annual changes in measured performance were less than 0.9 mm/year for rut depth, 27 mm/km year for IRI and 1.3/year for friction number. Statistical analyses of SMA mix volumetric and gradation properties and pavement performance confirm that the SMA mixes have been well controlled with uniformity excellent performance