As you drive, the grey dashed line turns into a yellow dashed line, signaling it is now "discovered".

Near the SS131/DCN, look for a dirt road to the right of the PP Chimica Italia depot. 🛠️ Tools for 100% Exploration

Most secret roads do not contribute to your total map exploration percentage (100% Achievement), but they offer shortcuts, scenic views, or hidden company depots. 📍 Key Unmarked Locations (Update 1.46)