summit tank still sees the occasional bank engine with heavy steel trains regularly using the unanderra to moss vale line to gain access to the main south line to melbourne. other traffic on the line includes container trains, bulk wheat and other grain trains, mostly from southern new south wales; coal trains from tahmoor; western coal trains using the line during illawarra line trackwork; limestone trains from medway, as well as the once-a-month cockatoo run to and from sydney.