Two people have been killed and two others have been injured in a car crash outside of Bathurst while travelling to the funeral for a friend also killed in a road accident.

Four people were travelling in a Ford Festiva on the Great Western Highway when it veered off the road and hit a tree at about 10.20pm yesterday.

Driver Troy Lincoln, 24, and passenger Rebecca Mather, 31, survived the crash, but passenger Claudia Chown, 18, was killed instantly.

Driver Troy Lincoln managed to survive. (9NEWS)

Claudia Chown was killed on impact. (9NEWS)

Jake Chaffey was pulled from the crash alive, but died this morning after arriving at hospital.

Mr Chaffey's sister Kayla Daley said the 21-year-old was "a great person and didn't deserve to go like this".

"They were heading back to Young to go to Tumut tomorrow for their friend's funeral who passed away in a car accident last week," she said.

Kayla Daley said her brother did not deserve to die this way. (9NEWS)

Jake Chaffey was removed from the car alive but died in hospital the following morning. (9NEWS)

"What are we going to do at Christmas? We just don't have him any more."

The four friends were travelling to the funeral for 20-year-old Rickie-Lee Atkinson, who was killed in a high-speed collision near Wallendbeen on May 14.

Police said they are still trying to determine the cause of the crash but suspect speed was a factor.

Police believe speed may have been a factor in the crash. (9NEWS)

"When you get into a car and you've got people with you, it's not just your life, their lives are in your hands," Ms Daley said.