Signalling between Aubin Grove and Rockingham has been modified, with five new signals installed and commissioned to allow bi directional running on either main between those locations.
Signal 694 has been erected at Rockingham to allow trains to depart Rockingham Station on the opposite main and travel towards Aubin Grove, signal 695 has been erected to allow a train coming from Aubin Grove on the opposite main to enter Rockingham yard/ platform.
Signal 692 has been erected at Aubin Grove station to allow a train travelling on the opposite main to enter the down platform, Signal 693 has been erected to allow a train standing on the Up platform at Aubin Grove to travel back towards Rockingham. 690 signal was erected at the Perth end of the down platform facing the up direction and is fixed at red, and prevents traffic from proceeding towards Cockburn Central.
I believe automatic signal (absolute) U236 is now semi automatic (Controlled absolute) signal 688. Also Automatic signal D239 is now controlled automatic signal 691.