UP to 100 litres of fuel threatened to trickle into Coochin Creek after a car was sandwiched between two trucks on the notoriously bad strip of the Bruce Highway near Roys Rd yesterday.
Traffic banked up for several kilometres in the northbound lanes of the Bruce Hwy from about 1pm when emergency services were called to the scene.
Queensland Fire and Emergency Services North Coast region acting inspector Jon Webb said slippery and greasy roads and wet weather did not help when a car veered into the path of a truck.
"A semi-trailer was sitting at Roys Rd waiting to turn on to the Bruce Hwy minding its own business," Mr Webb said.
"The sedan in the right-hand lane has come across in front of a prime mover which was in the left lane, which didn't have a trailer attached.
"The prime mover has tried to stop and in that it has spun around and collected the sedan and come across and the sedan slammed into the stationary truck and the prime mover has come in behind.
"They were very lucky, it was probably head-on and the impact was taken at the front, side-on crashes do not end well."
The front of the sedan slammed into the fuel tank of the stopped truck, sending diesel spilling on to Roys Rd.
Goldings Construction company workers, who were on the Bruce Hwy project just metres up the road brought down their machinery and material to build a dam wall in the gully to assist firefighters in stopping the fuel progressing any further.
The Environmental Protection Agency was also called to assess the situation.
The four people in the car were taken to Nambour General Hospital in a stable condition. A 68-year-old man had leg injuries, a 66-year-old woman had cuts to her face, a 41-year-old woman had arm injuries and a 15-year-old boy had back pain.