Traffic is still moving after a B-double truck rolled over on the side of the southbound lane on the Hume Highway, three kilometres south of Marulan.
The driver was able to free himself from the truck and was being treated by paramedics for minor injuries not long after the accident happened about 3pm on Wednesday.
The cause of the crash is under investigation, however, officer-in-charge at Goulburn Police Station Inspector Matt Hinton said the truck was travelling in the northbound lane before it left the road, went through the median strip into the southbound lane and rolled on the side of the highway.
Police first thought the truck was carrying toilet paper but now understand it was carrying serviettes, Inspector Hinton said.
A small fuel spill was being attended to by Fire and Rescue NSW, however, there was no fire, NSW Rural Fire Service Southern Tablelands operational officer Lachlan Gilchrist said.
Police and Roads and Maritime Services were trying to savage the vehicle after 4pm and Inspector Hinton urged drivers to slow down while that happened.
Marulan Rural Fire Brigade was also on scene in case of a fire, Mr Gilchrist said.