This is made by heating the asphalt binder to make it less viscous, and drying the aggregate to remove moisture from it before mixing it. Mixing is done at about 300 °F (roughly 150 °C) for virgin asphalt and 330 °F (166 °C) for polymer modified asphalt, and the asphalt cement at 200 °F (95 °C). HMA is used on roads with lots of traffic.