Metrolinx, the government agency charged with integrated transportation planning for the Greater Toronto Hamilton Area and Infrastructure Ontario selected the AirLinx Transit Partners consortium for a joint venture contract worth CA$129 million (US$130.03 million). The spur line will be delivered using Ontario's alternative financing and procurement delivery model, which is managed by Infrastructure Ontario.

As lead designer for the consortium, AECOM will provide expertise in architectural, structural, rail, utility relocation and environmentally sensitive design for the three-kilometer (1.8-mile) spur line that will cross above and below major existing access infrastructure. It will also link Metrolinx's GO Transit's Kitchener line to Toronto Pearson Terminal 1. The scope of services includes a new elevated guideway and track on high-level bridges and at-grade rail structures; relocating existing utilities; providing provisions for the future electrification of the ARL and ensuring that construction on airport lands will not interrupt the Greater Toronto Airport Authority's capital works program.