Member for Kiama Gareth Ward announced the five access roads for stage one from Mt Pleasant to Toolijooa Road on Wednesday following an 18-month campaign by the Princes Highway Action for Safety (PHASE) group to have direct property accesses eliminated.

The first will service the first three properties immediately south of the Mt Pleasant lookout, the second will connect the dairy farm north of Rose Valley Road to the Rose Valley interchange, the third will connect two properties south of Omega Lane to a cattle underpass underneath the upgraded road onto the Rose Valley interchange, the fourth will connect Sims Road to Belinda Street and the fifth will connect the Old Toolijooa School Pottery and two other properties to the road.

They will add about $5 million extra to the upgrade's price tag.

Alne Bank Lane resident Andrew Moss said the Sims Road access would be an improvement on the current situation.

"Under the old arrangement if you were going into Sims Road from Gerringong, you'd have to speed up to 100km an hour from the interchange and then immediately slow down to turn onto Sims Road, which is incredibly dangerous and frustrating for vehicles behind," he said.

"With the service road, if kids want to walk or ride their bikes into Gerringong, they can do it safely."

As PHASE's chair, not receiving a service road was a bitter pill to swallow for Robert Christie - he will receive an extended shoulder to enter the highway from his property directly.

"Personally it's disappointing and it's one that I'll continue to speak to the RTA about - some of those accesses are equally dangerous, if not more dangerous than mine," he said.

"What the RTA doesn't take into account is the money it would save by removing those direct accesses, and if the service roads save one life, they'll be saving the community $2.4 million.

"To put it in blunt terms, they're paid for if two people's lives are saved."

Mr Ward said PHASE's service road proposal would have meant larger land acquisitions.

An RTA spokeswoman said the 25 direct property accesses and two local road accesses would be reduced to 17 property accesses and one local road access.

Mr Ward said the tenderer for stage one of the upgrade is expected to be announced by the end of the year .