Airport crash, fatality in northern NSW

A man has been killed in a head-on collision between a truck and car in far northern NSW.

The 45-year-old car driver died at the scene of the crash on Tweed Valley Way at Tumbulgum early on Wednesday.

The truck driver was taken to Gold Coast University Hospital with leg injuries.

Meanwhile, a 20-year-old man died in hospital on Wednesday morning from critical injuries after his friend's car rolled and landed on a safety barrier near Sydney airport.

The man had to be freed from the front passenger seat of the Mitsubishi Lancer after the crash on General Holmes Drive in Mascot, at the start of the airport tunnel, at about 9pm on Tuesday.

The 18-year-old man who was driving and three other passengers - two 18-year-old women and a 20-year-old man - were taken to hospital for checks.