THE DRIVER of a truck that rolled over at the intersection of Werris Creek and Gaps roads remains trapped inside more than an hour after the crash.
The road is closed in both directions as emergency services work to free the driver.
A NSW Police spokesman said the rollover occurred shortly after 8am.
"Motorists are advised to avoid the highway between Werris Creek and Currabubula this morning as emergency services respond to a heavy-vehicle rollover," he said.
"Motorists are urged to avoid the area as emergency services work to free the driver who remains trapped by confinement."
The accident occurred in the northbound lane between Werris Creek and Currabubula.
Anyone travelling south or north from the Quirindi area are urged to travel via the New England Highway via Quirindi, alternatively via Gunnedah on the Oxley Highway.
Traffic diversions are in place and updates are available at Live Traffic NSW.