The Influence of Retroreflective Coefficient of Pavement Reflective Markings

The retroreflective brightness coefficient of pavement markings is crucial for ensuring road traffic safety during nighttime driving. The magnitude of the retroreflective brightness coefficient directly affects the visibility of pavement markings to drivers at night, thereby guaranteeing their safety while driving under low-light conditions. This article provides a detailed discussion on the factors influencing the retroreflective brightness coefficient of pavement markings—from the principles of retroreflection and the amount of glass beads applied, to the luminance factor of pavement marking paints, the particle size of glass beads, the material and manufacturing processes of glass beads, and construction practices.

Keywords: road markings, road marking paint, luminance factor, glass beads, retroreflective luminance coefficient

III. Factors Affecting the Retroreflective Coefficient of Pavement Reflective Markings

1. The amount of glass beads spread per unit area

2. Brightness factor of pavement marking paint

3. Roundness of glass beads

4. Distribution of glass bead particle size

5. Glass beads are made of glass material.

6. Glass bead firing process

7. Embedding depth of glass beads in the coating film

8. Refractive index of glass beads

9. Coating