A cereal-carrying B-double which rolled at South Kempsey on Wednesday led to the road being momentarily closed while it was cleared.
At 12.40pm, the Volvo truck was driving through a South Kempsey roundabout on the Macleay Valley Way when it tipped.
Police believe it was driving at about 20kph at the time.
The driver, a 51-year-old Pottsville man, was uninjured and climbed out of the truck through the windscreen.
Traffic was momentarily halted while the truck was cleared from the road shortly after 5pm.