The use of High Modulus Asphalt Concrete (HMAC) for base and subbasehas steadily increased for the last fifteen years. Several technologiesare suitable: selection of very hard bitumen, addition of asphaltite,addition of polyolefins. Rich or lean mixes can be designed. Richermixes are easier to compact and less sensitive to water. The resistanceto rutting and the stiffness moduli are similar, irrespectiveof the richness. The long term in-place behaviour can be ratedas satiafactory. A new type of HMAC has been designed to obtainhigh fatigue resistance. It contains a high amount of binder,which is a composite of very hard bitumen and polyolefin. Thefirst trial sections are being monitored. HMAC for binder andwearing courses began to be used recently. They are designed toreach not only high stiffness and excellent rutting resistance,but also sufficient surface macrotexture. The observation of thefirst sections laid shows no rutting under extremely heavy trafficand an overall satisfactory performance to date.