A Heavy Vehicle Tow Truck has moved the earlier broken down truck in Coffs Harbour.
Motorists can expect delays for some time as traffic returns to normal.
The truck had blocked the right-hand lane of the highway just after 11am.
An oversized truck carrying a concrete support has broken down on the Pacific Highway in Coffs Harbour.
The road is blocked in the right-hand lane northbound just after the Big Windmill, with both lanes affected.
Traffic is now banked back to the South Service Centre near Englands Road.
Motorists are encouraged to detour via Toormina Road, along Hogbin Drive.