PURPOSES : The current research aims to evaluate the impact of coating materials and temperature on the percentage of bead loss in pavement markings. METHODS : Five mixtures with varying numbers of coating layers (C0, C1, C2, C3, and C4) were prepared to assess the effect of coating layers on bead loss. The effect of stripping was simulated using a modified Hamburg Wheel Tracking test. Furthermore, the influence of temperature and coating material on bead loss was examined using control mixture (without coating), YR, and SY coating mixtures. The percentage bead loss was evaluated by a developed image analysis program. RESULTS : The results demonstrated a substantial reduction in bead loss as the number of coating layers increased, with the C4 mixture showing an impressive 4.3% bead loss after 500 HWT braking cycles compared to 27.4% for the C0 mixture. Higher testing temperatures resulted in increased bead loss, with the control mixture exhibiting the highest percentage loss at 7,500 HWT rolling cycles. Conversely, the YR and SY coating mixtures displayed superior resistance to bead loss. Statistical analysis confirmed the significance of coating layers in reducing bead loss, further supporting the effectiveness of coatings in preserving bead adhesion during HWT cycles. CONCLUSIONS : The findings highlight the potential of coating materials as a key protective measure for enhancing the longevity and performance of pavement markings.

1. Introductuon
2. Materials and Methods
    2.1. Materials
    2.2. Sample preparation
    2.3. Test methods
3. Results
    3.1. Effect of number of coating layers
    3.2. Effect of temperature
4. Conclusions
ACKNOWLEDGMENTS

• Su-Hyung Lee(Senior Researcher Dept. of Highway & Transportation Research, Korea Institute of Civil Engineering and Building Technology 283, Goyang-daero, Ilsanseogu, Goyang-si, Gyeonggi-do 10223, Korea) | 이수형 Corresponding Author