f the minimum temperature of the pavement is 50 u00b0 f the paint is then sprayed on the asphalt pavement surface of a roadway in four inch wide or wider stripes the surface of the roadway has been swept clean and air blasted to remove dirt and other residues in the areas where the paint is to be applied the paint is allowed to dry until it is no longer tacky to the touch a no tack condition and this usually occurs in about 30 minutes it is completely dry in about an hour depending upon the moisture content of the ambient air the higher the moisture content of the air the longer the paint takes to dry completely the dried highway paint exhibits greater durability improved abrasiveness and the luminescence materials exhibit a longer life and greater intensity by the order of magnitude of 10 than previously known because the polyurethane resin in the paint composition tends to prevent oxidation of the luminescent materials in the paint previously luminescent phosphorescent materials used outside exhibited a useful life of a minimum of days before degradation is obvious the current effective useful life of luminescent materials in the paint composition of the present invention has no minimum and is now a function of the longivity and or wearability of the paint composition itself the durability of the paint on the roadway is also greatly increased due to the polyurethane resin and the abrasive in the paint reduces the tendency of vehicles driving over the paint to skid a marked safety factor when it is desirable to have reflectorized highway markings or to increase the reflectivity of.