Fire and Rescue NSW crews have freed a man trapped in a car following a four-car collision at Corrimal.

The middle-aged man, who suffered a fractured clavicle, has been taken by paramedics to hospital.

Paramedics also attended to an elderly male with head injuries, and a woman and a child.

Fire and Rescue NSW crews took 15 minutes to remove the trapped man from the vehicle, using specialised equipment to cut away the car door.

Live Traffic NSW is advising Memorial Drive is closed in a southbound direction and is being diverted at Rothery Street.

It is urging motorists to use the Princes Highway.