Raised Solar Road Marker Light With 40 Tons Compressive-Nokin Solar . Road studs are commonly known as highway studs or railways studs or highway markers.Road Recycled Glass Aggregate (RGA) Case Studies - Sims Municpal In 2013, SMR provided more than 40,000 tons of RGA to serve as a gas venting layer in the Avon landfill capping project.