The 27-year-old man, called Jimmy, was driving along a regional Queensland highway when he spotted a brown snake slithering up his leg.
Although its venom is not as deadly as the reclusive Australian inland taipan, it is a fast-moving, aggressive snake responsible for more deaths each year across the nation than any other snake.
The officer located the brown snake in the ute tray.
Then Jimmy killed the snake, hit the gas and went to the nearest hospital.
When Jimmy was finally able to pull over for police, the snake was laid across the back of his ute, and he feared he'd been bitten.
Jimmy then used a seat belt and a work knife he had in the ute to fight off and kill the snake while trying to stop the auto, police said.
He said in a statement that as he moved, the snake began wrapping itself around his leg and was striking at the driver's seat between his legs.
Another added: "Can I just say, well done to the policeman for remaining calm & not making the assumption the driver was blatantly ignoring the law".
Paramedics determined that Jimmy was in shock but had not been bitten.
A Queensland man made a terrifying discovery while travelling 100km/h on a regional highway last month.
The eastern brown snake is a highly venomous snake and one of the most deadly in the world.
"I've never been so happy to see a red and a blue light", Jimmy said in the video.
'I think it has bitten me, it was with me in the auto'. "You can feel my heart, my friend".
The police officer found the dead snake in the back of the vehicle, confirming the driver's story, video shows. They added that the snakes are protected under Queensland law, but this was a "particularly unique situation".