An SUV and a semi-trailer were travelling south on the Pacific Highway near Woodburn on Monday evening when they were involved in a minor altercation, NSW Police said on Tuesday.
The drivers subsequently stopped and got out of their vehicles and were reportedly fighting in the northbound lane when they were hit by the B-double truck.
Police believe the SUV driver was a Grafton man aged in his 30s while the semi-trailer driver was a man from Smiths Lake in his 40s.
“The scene that confronted police and emergency services last night would be best described as horrific,” Chief inspector William McKenna said.
He urged people concerned about tail-gating or other driving issues to pull over and contact police.
“It is not worth losing your life over, it is not worth continuing down the highway adding to that level of stress. Just pull over and let that vehicle pass,” Chief Insp McKenna told reporters.
The driver of the truck that struck the fighting men was taken to hospital for mandatory testing and he remained in shock.
Psychological support has been organised for emergency services workers who attended the crash site.
The highway was closed between Woodburn and New Italy for nine hours but has since been reopened.
Police are seeking witnesses to the incident.
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