Road Stud-P26.pdf. Description: Solar Road Stud / Solar Road Marker is a protruding sign. It's self-luminous, energy supply by solar panel . and durable Ni-mh battery. Generally used for paving road ,used at night or in the rain and fog weather, and sketched the outline of the road, to improve road safety. Applications: 1. Highway. 2. Bridge. 3.