The works will ensure the network is stronger for trucks and tractors travelling between local farms, depots and processing facilities.
Roads being targeted as part of work on the dairy routes include sections of Cobden-Warrnambool Road, Cobden- Stonyford Road, Cobden-Camperdown Road and the Princes Highway, which have all been identified as priority roads.
Crews are completing rebuilding and resurfacing upgrades to improve strength and longevity of the roads, while assessments will also be done to safeguard the integrity of bridges in the area.
Upgrades to the dairy supply chain are expected to be completed by mid-2021 – weather permitting.
Minister for Roads and Road Safety Ben Carroll said the investment supported the growth and development of the farming and tourism industries in the south-west.
“These works will not only support local economies, but they’ll also provide safer and more reliable journeys for local residents,” Mr Carroll said.