UPDATE: 7.30pm Traffic is banked up on the highway and it will still be well over an hour until the highway is open again. An exclusion zone has been set up around a cylinder. The grass fire is under control. The driver was not hurt in the accident.
A truck carrying gas cylinders has been totally destroyed by fire and has started a grass fire near Moruya this afternoon.
The Princes Highway is closed in both directions due to a truck fire near Bingie Road, about 8km south on Moruya.
Six emergency service fire trucks are on the scene.
With no suitable diversions, vehicles are also being parked on site.
Motorists are advised to delay their trip until the highway reopens, and allow plenty of extra travel time.
For the latest traffic information, visit www.livetraffic.com.