The new reflective foil from 3M Deutschland has higher reflectivity and a longer life than conventional reflective foils. The principle of retroreflexion is explained. The improved retroreflexion enhances traffic safety at night and makes a significant contribution to the prevention of accidents. Further advantages are the ready adhesion and easy removal of the foil. On motorways the danger of drives travelling in the wrong direction can be reduced by means of foil markings in the form of arrows. The foil also offers the possibility of conspicuous marking of the way to school. Two types of foil are available, a coloured soft aluminium foil scotch-lane and a permanent marking foil stamark with a synthetic base. (TRRL)