2.30pm UPDATE: All lanes of Mount Ousley are now open following an earlier car crash.
12.50pm: Motorists are advised that Mount Ousley Road is closed in both directions after a car accident.
A car towing a caravan is believed to have lost control and hit the median strip.
The accident occurred around 12.20pm near Picton Road. The road is closed in both directions.
A 78-year-old man and a 78-year-old woman have both been treated at the scene and will be transported to Wollongong Hospital.
Emergency services are on the scene.
Motorists should expect considerable delays.