Constant Bright Road Solar Stud Light For Pedestrian Crossing. Ruichen Solar Road Stud With Stem For Pedestrian Crossing The main products of RUICHEN group include solar road studs, reflective road studs, solar traffic signs and road marking machines.Our solar road studs are of high quality and strong enough to withstand pressure of 30-40 tons, with flashing or constant mode, and 5 colors for