Arc Infrastructure leases the majority of the network, with the exception of privately owned spur lines.

[6][7] The Spearwood to Bibra Lake section was retained to serve CBH Group and Elders Limited sidings until it too closed in 1991.

[9] The line provided access to the Kewdale Intermodal Facility - a major (if not the main) rail freight terminal in Perth.

The southern portion has not been constructed, and access to the Loop Railway is reliant upon the triangle intersection at Kwinana.

The Department of Transport has identified the Kwinana triangle is now approaching capacity, and it is seeking alternatives in order to ensure that future growth in rail-hauled freight can be accommodated.

[13] In December 2015 the City of Rockingham publicised its objection to the reinstatement of the extension of the loop railway.

[17] The relocated rail will run through the proposed West Mundijong Industrial Area, on the western side of the future Tonkin Highway alignment.