 A 24-hour freight-only airport at Monarto was proposed by the Liberal party while in opposition in 2017 as part of a broader policy to create a freight bypass of Adelaide from Murray Bridge to the Barossa Valley via Truro.The party was elected to government in March 2018 and the planning for the new airport and associated freight network was put to tender early July 2018.Immediately afterwards a leaked report called into question the viability of the airport.