Work has started on the second bridge at Shone Avenue as part of Wollongong City Council's West Dapto Access Strategy.
Wollongong Lord Major Gordon Bradbery said the $5.3 million project would help improve access in and out of West Dapto.
"It's part of a $70 million spend," Cr Bradbery said.
"So far we've spent $30 million. Over and above that will be the Fowlers Road extension, which will be another $45 million.
"It is quite a big project, slowly over time putting in all these bits and pieces in place."
Other parts of the project have included a bridge on Shone Avenue slightly further north, a bridge to the south near Dapto High School and a road that links up to Fairwater Drive.
Cr Bradbery said the work on the second Shone Avenue bridge would close the road until February.
"There's two bridges to the section and this is the second and larger of the two that help connect Shone Avenue to West Dapto Road," he said.
"The project also involves increasing the heights to make the road and the access more flood resistant.
"The idea is that we're elevating them about two and a bit metres above the existing road level to make it more accessible, especially during rain events."
While the road is closed, access to West Dapto will be via Bong Bong Road or the Cleveland Street-Fairwater Drive connection.