The terrifying moment a cyclist was confronted by a man wielding a knife has been captured on camera.

In a short video posted online, a cyclist is seen approaching a roundabout as a white four-wheel-drive appears to speed up from behind and attempt to push in front of him to go through the intersection first.

The cyclist attempts to swerve to avoid hitting the car, but hits the hitting the front and shouts: 'The f*** are you doing?' at the driver.

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The horrifying moment a cyclist was confronted by a man wielding a knife has been captured on camera

The driver jumped out of his car and confronted the cyclist for 'touching his car' - while brandishing a knife

While threatening the cyclist with a knife, the driver of the car shouted and swore at the man riding his bike

The man then continues to ride down the road at a speed of 30km/h, thinking he had escaped the potentially dangerous situation.

However, seconds later the four-wheel-drive races ahead of him and pulls up about 100 metres down the road.

'Oh here we go,' the cyclist is heard saying as he continues to ride down the street.

When he gets just metres away from the car, the driver kicks open the door and leaps out while brandishing a knife.

The video starts by showing the white four-wheel-drive speed up and appear to cut of a cyclist near a roundabout

A backward-facing camera shows the driver crossed over double lines and was just metres away before trying to race through the intersection

The driver, who was wearing a navy blue t-shirt, white shorts and sunglasses, faces the cyclist and holds the knife behind his body as if he is preparing to throw or thrust it at him.

'You f***ing d***head...you f***ing touched my car,' the agitated driver said.

'You're a f***ing idiot, I could charge you for that you piece of s***.'

After the cyclist shouted at the driver for cutting him off, the four-wheel-drive races ahead of the bike

The driver stopped the car about 100 metres from the cyclist, and kicked open his door as the bike approached

The driver, still holding the knife, then walks back to his car and drives away.

The terrified cyclist, who jumped off his bike to avoid the knife-wielding man, then walks back to it and rides away.

The rider later posted a description of the encounter online.

The terrified cyclist, who jumped off his bike to avoid the knife-wielding man

After shouting abuse at the cyclist at pointing at his car, the man got back in his four-wheel-drive and left

'This particular day saw an unusual amount of 'must get in front' attempts,' he wrote, referencing the four-wheel-drive cutting him off at the roundabout.

'I was able to fend off most with a strong position, and if necessary, a slight sudden movement further out.

'Not this one though! If the MGIF attempt, that saw him on the wrong side of the road at double white solid lines and almost going OVER the roundabout wasn't enough, what he did next I was not prepared for.'