A cyclist embroiled in an ugly dispute with a motorist on a busy Melbourne road has claimed his enraged actions “didn’t go far enough”.

Police are investigating after cyclist Brian Ward abused a driver for being on her phone while pulling onto Sydney Road in Brunswick around 1.30pm on Saturday.

Mr Ward came to a stop in the bicycle lane and proceeded to ram the driver’s car in a rage in front of stunned onlookers.

“Get of your f------ phone!” the cyclist said, repeatedly swearing as he hit the car while the motorist’s young child sat in the back seat.

“You're on your phone while you're driving, which is illegal while you're driving! I'm filming you! I'm filming you! I'm reporting you to the police.”

Police arrived at the scene to speak with witnesses but the cyclist intervened.

“She was at fault! She wasn't at fault! Your fault! I'm the victim here,” he said.

“They're putting my life in danger and they have no right to do so.”

The Brunswick cyclist proceeded to tell police the driver had pulled out without looking while on the phone and nearly hit him. He suffered no injuries.

Admitting he kicked the motorist’s car, Mr Ward said she denied being on the phone to police.