The early planning stages to widen Marshall's Creek bridge from two lanes to four have started with works to begin next year.

Professional driver Peter Rex was one of many motorists who raised concerns about the highway's set-up, which forced traffic to squeeze into two lanes across the bridge.

However, Mr Rex said the project, as well as the current upgrade of Eunony Bridge was a great start for the city's road infrastructure.

He said it was important to see ongoing improvements with congestion only increasing as Wagga's population continued to grow.

"This is a start of continual improvement to the infrastructure for the city's road system. We can only remain positive," he said.

Wagga councillor Paul Funnell campaigned for the bridge upgrade, believing it was "nonsensical" for Hammond Avenue's lanes to reduce from four to two, only to return back up to four.

"it is reasonably cheap to fix and makes a huge difference in traffic movement, flow, merging traffic and safety," he said.

Cr Funnell said it was promising to see discussions between the council and state government to ensure the upgrades of Eunony and Marshall's Creek bridges did not happen together.

Transport for NSW south west director Lindsay Tanner said the department is carrying out early planning for the upgrade, with environmental studies already carried out two days ago.

He said they were aware of the additional stress on the highway and will not start the project until the council's upgrade is finished.