Another example in Sydney is in the Railway Square road overbridge in George Street, Railway Square, over the spur which leads from the connection between Redfern and the Darling Harbour goods station. This was a two-track tunnel (one of the oldest on the New South Wales railways), but became gauntlet track when the line was electrified to allow electric locomotive-hauled freight trains to access the former Darling Harbour. There was insufficient clearance in the tunnel to install overhead catenary above both tracks. A single track now continues on to the Powerhouse Museum and can be visited as part of the Ultimo Pedestrian Network. This track formerly served the Darling Harbour goods yards and was disconnected from the rest of the corridor which now forms part of the Sydney Light Rail network.