The semi-trailer had just left Imbil s Superior Wood sawmill on Yabba Creek Rd at 2pm and was heading to Gympie with a 23-tonne load of woodchip. A truck driver was thought to be killed instantly when the semi-trailer he was driving rolled down an embankment on Yabba Creek Rd at Imbil yesterday afternoon. Photo: Frances Klein Just one kilometre from the sawmill the truck left the road and rolled - landing upside down on the steep embankment that drops down to Yabba Creek. The driver is thought to have died on impact, Senior Constable Greer said. The cab of the truck was crushed and the man remained trapped for hours before emergency crews could access the cabin, which was upside down halfway down the bank.