As part of the Gauteng Rapid Rail Extensions planning, the GMA undertook a comprehensive feasibility study of the possible extensions to the existing Gauteng Rapid Rail Integrated Network (GRRIN). This feasibility study was carried out under the framework for Public Private Partnerships (PPP) in terms of the relevant National Treasury regulations of the Public Finance Management Act, 1999 (PFMA). The feasibility study has been completed and the outcomes thereof are contained in the Feasibility Study for Possible Rapid Rail Extensions to the Gauteng Network report that has been submitted to National Treasury where it is awaiting Treasury Approval I (TAI) for Phase 1 of the proposed extensions.​​​​