 The utilization of industrial byproducts such as granite sand and calcium lignosulfinate has gained attention in recent years due to its potential to reduce environmental impacts associated with traditional stabilizers like lime and cement. Granite sand and calcium lignosulfinate have been found to be effective substitutes for clay subgrade materials in low volume roads. In this study, granite sand and calcium lignosulfinate were tested for their effectiveness in improving the performance of clay subgrade materials. The results showed that granite sand and calcium lignosulfinate can be used together to improve the performance of clay subgrade materials. Additionally, the use of granite sand and calcium lignosulfinate can significantly reduce the carbon footprint of road construction projects. This article was authored by Gudla Amulia, Arif Ali Baig Mogul and Abdullah Almaged.