Analysis of optical parameters of materials used for road markings

The study aimed to determine the optical parameters of road pavement markings using both stationary and dynamic measurement methods. The research described in the article was conducted on ten road sections with different surface types and marking technologies. The analyses enabled the determination of the retroreflection coefficient RL, luminance coefficients QD/β, and verification of marking contrast. The practical feasibility of using the dynamic method to determine contrast DC and evaluate road markings was demonstrated. Results indicated significantly higher RL and QD values for thick-layer markings compared to those of thin-layer markings. For example, the minimum required RL value for expressways is 150 mcd/lx/m2. In contrast, the surveyed sections achieved thick-layer markings of up to 573 mcd/lx/m2, while thin-layer markings ranged from 25 to 185 mcd/lx/m2. The conclusions highlight the need for regular monitoring of marking conditions (especially RL and QD), the use of materials that ensure durable retroreflection, and the utilisation of dynamic measurements for assessing longer road sections.