To what extent glass beads are important in road markings

In this study, the factors affecting the reflection characteristics of traffic lines in different climatic conditions, the effect of different types of glass grains used in traffic colors in terms of dimensions and shape, the role of rainfall on the reflection properties of applied lines and the effect of additives in the paint industry be checked. Based on the results obtained from the evaluation of traffic lines on highways in Tehran, it was found that the dirtiness of traffic lines plays a significant role in the characteristic of reflection.In the first part of this study, the effect of silicone additives to reduce the surface tension of traffic paint and consequently reduce the dirtiness of traffic paints was studied and an increase of 30 units in the reflection characteristic at night was observed. In another part of this study, the effect of rainfall was examined from two perspectives; Rainfall improves the reflection characteristics of day and night in terms of washing traffic lines. But on the other hand, during the rainy season, due to the creation of a layer of water on the lines and the difference in the refractive index of the car's headlights, the night visibility of the traffic lines decreases.In the final part of this study, the effect of glass grain size and their spatial shape, the effect of modifying the surface of coated glass beads and the effect of changing the type of traffic paint from cold thermoplastic to two-part thermostat were investigated and analyzed