Road Marking Staker (Pavement Layout Dot Marker) It is a positioning tool for road marking layout. It sprays marker dots on the pavement to provide reference for thermoplastic and cold-spray road marking machines, replacing traditional tape measurement and lime marking. When pushed forward, the ground-contact measuring wheel rolls on the pavement and drives the coaxial rotary encoder. Fixed pulses are output per full rotation of the wheel. The controller calculates travel