Do your pavement markings pass the test Retroreflectivity

Retroreflectivity Test Methods

Dry Method This test method measures the dry retroreflective (RL) properties of horizontal pavement marking materials—such as traffic stripes and road surface symbols. It’s performed using a portable or mobile retroreflectometer at the CEN-prescribed geometry in dry conditions.

Wet-Continuous Method This test method measures the wet retroreflective (RL-2) properties of horizontal pavement marking materials—such as traffic stripes and road surface symbols. It’s performed using a portable or mobile retroreflectometer to measure the retroreflection at the prescribed geometry in a standard condition of wetness—which is achieved with a wetting apparatus that continuously wets the measurement area with a consistent spray of water during the measurement

Wet Recovery Method This test method measures the wet retroreflective (RL) properties of horizontal pavement marking materials—such as traffic stripes and road surface symbols. It’s performed using a portable or mobile retroreflectometer to measure the retroreflection at the prescribed geometry in a standard condition of wetness, 45 seconds after the measurement area of a pavement marking has been wetted with 3 liters of water (applied to the measurement area).

How the optics are measured.

Pavement markings are viewed at extreme horizontal angles that are very different from what is seen with sign sheeting. Modern instruments measure reflectivity approximate to what is seen at 30 meters. Due to the extreme angles and optical systems, pavement marking retroreflectivity numbers are extremely low and measured in millicandelas, which are one-thousandth of the unit used to measure sign sheeting.