An alleged drug driver has climbed on the roof of a family car and stomped in the windscreen in a horrifying road rage attack in Melbourne.

Video, obtained by 9NEWS, shows a man jumping up and down multiple times on the family car in Sunbury.

After stomping in the car's windscreen on an 11-year-old girl in the front passenger seat, the man jumps off the vehicle and picks up a wooden bollard.

Video, obtained by 9NEWS, shows a man jumping up and down multiple times on the family car in Sunbury. (Nine)

The alleged thug stomped in the windscreen on an 11-year-old girl left terrified in the car. (Nine)

The thug walks around the vehicle, allegedly threatening to hit the family with the object.

Thankfully, moments later a police cruiser arrives and the man is arrested.

The mother and her two daughters, aged 11 and four, were not physically injured in the alleged attack.

The thug walks around the vehicle, allegedly threatening to hit the family with the object. (Nine)

The road rage attack lasted a horrifying 30 minutes, during which time the family was followed through Sunbury, The Herald Sun reports .

The driver eventually rammed the family car before getting out and unleashing his alleged attack.

"I thought we were done for. I thought he was going to kill us," the mother told the newspaper.

"He hit me and our car ended up on the wrong side of the road. I got to the right side of the road and he hit us again.

"I thought we were done for. I thought he was going to kill us," the mother said. (Nine)

The mum called Triple Zero and told authorities she was driving to the police station, as the offender allegedly followed.

"I couldn't lock the car in time. He opened up the car door with the bollard in his arms. When he was about to hit her, I grabbed her and laid on top of her," the mum said.

"It was horrific."

The 24-year-old alleged offender has been released on bail after being charged with reckless conduct endangering life and drink-and-drug driving.