The NSW Government this week announced expressions of interest were now open for the Sydney Gateway project.
Private companies were encouraged to bid on the toll-free Sydney Gateway which according to Premier Gladys Berejiklian would take around 10,000 heavy vehicles destined for Port Botany off local streets in Mascot every day.
"The delivery of the toll-free Sydney Gateway will be a massive improvement to the way motorists travel to Sydney Airport," she said in a statement.
The latest in Sydney's city-shaping infrastructure projects would reduce the trip from Parramatta to the Airport by 40 minutes and provide a new alternative route to the domestic and international airport terminals from the St Peters interchange according to NSW Minister for Roads Andrew Constance.
"Sydney Gateway will include a dedicated flyover to the front door of the domestic airport terminal and improve connections towards Port Botany," he said.
"There will be further time savings from Parramatta, Dee Why, Moorebank and Campbelltown and provide relief to Southern Cross Drive, King Georges Road and the M5 East Tunnel."
Trips between Eastern Creek and Port Botany are expected to be reduced by 36 minutes with a saving of 30 minutes from Haberfield and 20 minutes from Moorebank for commercial vehicle operators.