Work will slow from mid-September until about mid-October.
The upgrade - which has been delayed due to work restriction and wet weather - is designed to improve traffic flow, road safety and the overall driving experience on the key section of the Cobb Highway.
Previous stages of the project have included road reconstruction, drainage improvements, new turning lanes and medians, along with upgrades to pedestrian infrastructure.
Transport for NSW says work will continue on road shoulders and median construction until mid-September before crews leave the site temporarily to allow preparations for the increased traffic expected for the Muster.
Road resurfacing is expected to resume in mid-October, with a revised construction schedule.
The project has experienced a number of setbacks, including a nationwide restriction affecting work around telecommunications infrastructure and several days of heavy rain.
Edward River Council's civil works component is expected to be completed in mid-September, weather permitting.
Council crews will also continue installing kerb and guttering, new footpaths and streetscape improvements as part of the broader Hardinge St reconstruction project.
Traffic restrictions will remain in place throughout.
Motorists should continue to observe the 40km/h speed limit and parking restrictions through the work zone.
Access to the Hardinge St Plaza complex will remain via Wood St only, while access to other businesses and residences will continue from Hardinge St.
Transport for NSW has also advised that some driveways along Hardinge St may need to be temporarily closed when resurfacing work recommences next month.
When work resumes, crews will complete resurfacing before moving on to line marking and the installation of new signage.
Stage one of the project is currently scheduled for completion in mid-December.
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