360 Degree Solar Road Stud For Expressway In South Africa-RUICHEN Solar Road Stud Manufacturer. 360 Degree Solar Road Stud For Expressway In South Africa. Round Plastic Solar Road Studs With Animals In South Africa. Round Plastic Solar Road Studs With Animals In South Africa. On the pastures in South Africa, you will see the round plastic solar road studs were installed on the heads of the sheep.