ZDR 6020 Dynamic Reflectometer from Avantech Engineering Consortium Pvt Ltd is used for high speed continuous measuring of night visibility of road markigns as seen by a vehicle driver driving with dipped headlight. All important data are recorded at the same time : RL, GPS coordinates, ambient temperature, relative humidity, speed, picture, voice recording as well as date and time. Data recording with up to 600 measurements per second for precise and repeatable measurements. The measuring head can be installed on either side of the car. Markings of different colours can be measured. Easy to operate with the RetroGrabbre software and easy reporting using the mapping and data analyzing software mapping tools. Has in-car display with touch panel with RL values shown in a bar diagram on the driver display. This graph is a visual support and quickly show irregularities of the measured results.