Completing the F6 extension and improving the A3 and A6 road corridors have been listed as a "priority" in a new report by federal government advisory body, Infrastructure Australia.
Another "priority" project is increasing berthing capacity for cruise ships, but several options are given, and there is no specific reference to a proposed new terminal in Botany Bay that has met with stiff opposition.
The 2019 Infrastructure Priority List identified 121 nationally significant "high priority" and "priority" proposals.
The report said of the F6 extension, "There is no motorway standard route between the Sydney motorway network and the M1 Motorway at Waterfall".
"Demand for road travel along this corridor is high and the arterial network is at capacity during peak periods," the report said.
"The three crossings of the Georges River, which together accommodate almost 200,000 trips per day, are at or close to capacity.
"These problems lead to long travel times, both because of slower speeds and intersections on arterial roads, and congestion."
The report said the state government had committed to building stage one between WestConnex (New M5) and President Avenue, Kogarah.
Next steps required the government to complete business case development of remaining sections.
The report said high volumes of traffic on the A3 and A6 arterial roads were leading to slow and unreliable trips, and impacting on freight productivity.
Capacity constraints could be addressed through a range of initiatives, such as intersection upgrades and road widening.
Roads and Maritime Services is progressing a $40 million widening of King Georges Road between Stoney Creek Road at Beverly Hills and Forest Road at Hurstville.
Botany Bay was not specifically mentioned when the problem of a lack of capacity at cruise ship terminals in Sydney harbour was addressed.
The report said capacity constraints at existing terminals could be addressed through different initiatives, including "optimising scheduling, operations and pricing".
Other options were to modify existing non-passenger terminals to allow cruise ship usage and develop new cruise ship terminals.
The report listed three "high priority" proposals affecting St George and Sutherland Shire, all of which are being acted on to some degree by the state government.
They include the need for more train services, the Sydney Gateway road link and duplication of the Port Botany rail freight line.
The 2018 state budget provided funding to digitise signalling on the rail network, allowing and extra five trains per hour to run on the T4 Illawarra line and eight on the T8 Airport line during peak periods.
The extra services won’t be added until the "early 2020s” and will be introduced “progressively”, with an unclear completion date.
The Infrastructure Australia report said demand on the T4 and T8 lines was forecast to exceed capacity in peak times by 2021.
