The effects of cellulose, glass, mineral and synthetic polyester fibres on the wear and deformation of asphalt pavements are shown. Cellulose fibres were found to be good because they stabilise greater amounts of bitumen in the asphalt pavements. A synthetic polyester fibre was found to be a real reinforcing fibre in bitumen. If high stiffnesses are needed for pavement layers a harder, elastic synthetic styrene-butadiene-rubber bitumen together with suitable fibres can also be used. This binder in asphalt mixtures produces high resistance to deformation at high temperatures.