Roads Minister Duncan Gay announced last December that he would direct the Centre for Road Safety and Roads and Maritime Services to conduct a review of the road.

The review came about after a meeting with Wollondilly MP Jai Rowell and representatives from Campbelltown, Wollondilly and Wollongong councils.

The meeting took place after two fatalities on Appin Road last year.

In September, 2012, eight-year-old Brock Anderson died when his father's Holden Commodore and a Subaru Impreza collided 10 kilometres south-east of Appin.

Nineteen-year-old Thomas Scott-Dobie died a month later when his Hyundai coupe and a Holden Rodeo utility collided four kilometres east of the West Cliff Colliery entrance.

In June this year, a Transport for NSW spokesman said "the report will be released shortly".

Three months later, in September, nothing had changed, with a Transport for NSW spokeswoman saying "the report will be released shortly".

This week, a transport spokesman confirmed the report had been completed but did not answer questions about when it would be released.

However, the spokesman said Roads and Maritime Services had already begun work.

"This has included line marking on Appin Road at Lodden River this year," the spokesman said.

"Work to rebuild the road west of Westcliff Colliery is expected to be completed this financial year.

"In 2012, work to resurface the road between Bulli Tops and Loddon River, a $169,000 resurfacing project from Illawarra Street to Wilton Road in October and a $976,000 project to repair damaged bridge bearings on Appin Road Bridge were completed."