New and extended clearways are being installed between the Hume Highway at Villawood and Parramatta Road in Parramatta.
Demolition works have started on the Stapley Drive bridge replacement project. The project comes as part of the M1 Pacific Motorway upgrade.
Major works to remove the Toorak Road level crossing will begin over the next month.
Infrastructure Minister Michael McCormack has inspected Australia's first diverging diamond interchange, as construction continues on the Bruce Highway.
The state and federal governments have agreed to commence construction on South Australia's 10 Urban Congestion Fund projects within 12 to 24 months.