The family of a young man killed in a car crash on Sydney's notorious Richmond Road have called for urgent safety upgrades.

Statistics will remember Damien Carwaj coldly as the sixth death on the state's roads this Christmas.

But so much more than a number, Damien was Danielle Lewin's twin brother.

"There are no words to explain the way it feels. It's shattering. It's gut-wrenching," she told 7News.

The 27-year-old was a volunteer firefighter who had just moved home to care for his mother.

He had only just bought his brand new Ford XR6. At 6:50am yesterday, it was pulverised by a car that careered through a "Give Way" sign on South Street.

The 24-year-old driver was an L-plater driving solo.

His family are in shock.

"I was so angry when I heard that. I just… How? Why?" sister Danielle said.

Damien was a proud Rural Fire Service volunteer. His colleagues responded to the crash and had to cut their mate from the wreckage.

Damien’s was the third death on Richmond Road at Marsden Park in four months.

In July, the state government fast-tracked an upgrade of Richmond Rd and it was supposed to start this year.

The first stretch of 2km will cost $45 million but it does not cover the intersection where Damien was killed.

That will be covered in Stage Two, due to be completed by the end of 2015.

Danielle says something needs to be done: “I just don't want it to happen to anyone else."

Latest From 7News