Anyone driving along the Princes Highway at either end of the project at Bomaderry in the north and Nowra in the south can see the progress.

Around 850 people have so far been inducted on the project and have worked around 150,000 hours.

One of the major parts of early progress on the project is the construction of the temporary rock platform and jetty into the Shoalhaven River from the southern bank.

The rock platform which includes around 22,000 tonnes of material and is approximately 130m long and around 45m wide.

Massive concrete road access was being constructed to the site last Friday to make it easier for vehicles to access the platform.

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Eventually the platform, which has been affectionately dubbed by some locals as "Fulton Hogan Island" will be used by machinery to install the piling for the bridge on the southern side of the project.

In the northern half of the river, where the water is deeper, piling and bridge work will be carried out from barges and boats.

A spokesperson for Transport for NSW said the new bridge will require 39 steel piles driven into the river bed, with nine piers across the river to match the existing concrete bridge.

"Four piers on the southern side will be built off the temporary rock platform while the other five piers on the northern side will be built off barges," the spokesperson said.

"When the bridge is complete, the temporary platform will be removed and some of the material will be reused elsewhere on the project."

There are around 50 pieces of machinery onsite including an 85 tonne excavator and three D10 dozers.

Throughout the project site vegetation removal, especially near the Shoalhaven City Council administration building backing onto the Princes Highway, has continued to establish work areas where the new highway will be moved to the west.

Installation of around 80 per cent of the project's nest boxes is complete with more to be installed over the coming week

Median islands along the Princes Highway have been removed and around 800 metres of steel barriers and around 400 metres of concrete barrier installed to establish safe work areas.

Utilities have been relocated including an electrical relocation at highway and Illaroo Road

Pedestrian and cycle detours on the south and north sides of the existing bridges and along Bridge Road have also been put in place and Scenic Drive, off Bridge Road is now closed to traffic, however access to the Riverside Thai Restaurant is still available.

On the eastern side of the highway construction is also well underway on a new connecting road that will link Lyrebird Drive with the highway.