The Sydney West (Free Roam) v 0.9 traffic layout mod for Assetto Corsa is a modification that allows players to explore a digital version of the Western sections of Sydney. It's a free-roam mod, emphasizing exploration over racing or competition. The main feature that sets this mod apart is its realistic traffic layout. The traffic layout is designed to accurately replicate the real-life traffic systems of Sydney West, providing players with an immersive driving experience as they navigate city streets, highways, and other features of Sydney's road systems.