total cost of . The project was reduced to three lanes each way with two intermediate interchanges. The railway component was removed, with a corridor reserved on the western side of the motorway for future use. The road is not subject to direct tolls, but South Australia will become a testing ground for a "network fee" which involves charging trucks based on road use and impact in place of high registration fees. The first new bridge to open to traffic was the bridge over the new motorway at the Waterloo Corner interchange. This bridge was opened in March 2019 to provide the new access route into St Kilda, replacing several roads that had been cut by the motorway. The last road to be closed in the area was St Kilda Road, three days after the new bridge opened. The next new bridges were the twin bridges over the Port River Expressway at the southern interchange. They replaced the original Craig Gilbert Bridge which was closed and demolished in May 2019. A temporary off-ramp from South Road to Salisbury Highway was provided, which used the new southbound bridge and the future Port River Expressway to South Road on-ramp. In July 2019, the bridge for the end-state off-ramp opened to traffic, carrying north east traffic over the Northern Connector. The bridge over the expressway at Bolivar Road opened for access into the Bolivar Waste Water Treatment Plant about a week before Christmas 2019. The final alignment of the northbound carriageway of Port Wakefield Road at the northern interchange opened at about the same time, over a new bridge that passes over the southbound on-ramp from Port Wakefield Road. The whole road opened to traffic on 7 March 2020. Construction Lendlease was awarded the contract. The announcement included support for other sectors of the South Australian economy, with a requirement that 7,500 tonnes of steel would be sourced from Arrium, and that the work would stimulate urban renewal and generate employment locally in other sectors. There was a contractual obligation that at least half of the 480 workers were required to be hired from the northern suburbs of Adelaide, where other industries had been reducing or shutting down their workforces, such as Holden. At least 20% of the workforce were required to be either Aboriginal, an apprentice/ trainee, or long-term unemployed. In November 2016, it was announced that the majority of the road