Steve Schreiber died on the evening of June 12, when his Mitsubishi Outlander crossed onto the wrong side of the Sturt Highway, and was hit by a semi-trailer near Forest Hill.

Leading the push for a heavy vehicle bypass in the city is CEO of Committee4Wagga Alan Johnston.

While he admits it is impossible to know how the outcome may have differed if there was a bypass, fewer trucks on the road has the potential to mean reduced severity in crashes.

"We'll never know what could have happened," he said.

"The bypass, whatever form it ends up taking, will likely be single-lane.

"If a vehicle crosses to the wrong side of the road, no bypass will change the likelihood of a head-on collision. But between two cars is a very different thing to when it involves a truck."

The fight for the bypass is one that Independent MP Joe McGirr has also joined.

In a statement to The Daily Advertiser, he echoed Mr Johnston's sentiments in the wake of the tragedy.

"My heart goes out to those affected by this tragic incident," Dr McGirr said.

"We cannot assume having more or less trucks on the road would have made a difference in the circumstances surrounding this heartbreaking event.

"But, the reality is a bypass would take heavy vehicles off that stretch of road."

The questions have emerged following a Roads and Maritime Services study concluded in March, that there was "low demand" for the Sturt Highway bypass.

Mr Johnston and the members of the Rural Ratepayers' Association were vocal against the findings, citing council's population growth strategies that will see the city swell to 100,000 people by 2038.

"The volume of traffic will increase in the next 30 years, so we need to find some ways to manage that," Mr Johnston said.

"With the Special Activation Precinct coming to Bomen, there will be more trucks on the roads."

Viewing the growth in 30 years hence, Mr Johnston said it is a matter of "planning in the downtime" to prepare for the future.

"[The bypass] needs to start happening now, you don't build significant infrastructure in just 12 months," he said.

Each year, Wagga is estimated to increase its population by between two and five per cent.

"We're growing now, you don't want to be getting to year 19 in the 20-year plan before you start putting these sorts of things in motion," Mr Johnston said.

"We need this sooner rather than later, we need to be taking the trucks out of our main city now."

Dr McGirr agreed, saying the bypass plan was foremost about "making sure our region grows responsibly".

"With traffic set to increase as the population grows, it is clear that bypass would increase the safety of all drivers on our roads," he said.

TransportNSW is currently reviewing the plans for bypass, and Mr Johnston expects a decision to be handed down in September.

"I'm hopeful," he said.

"I have an expectation that this will be a decision that Wagga needs and that will take the city's growth into account for the next 30 years."