Phase 1 of the GRRIN extensions has been proposed as​ a Public -Private Partnership (PPP) project according to Regulation 16 of the Public Finance Management Act, 1999.

A PPP is a contract between a public sector institution and a private party, in which the private party undertakes to perform an institutional function on behalf of the public institution for a specified or indefinite time, whilst incurring the substantial financial, technical and operational risk of the project.