A man who terrorised motorists by deliberately colliding with them and attacking their vehicles with a hammer and a baseball bat told one of his victims he would find out where she lived.

Key points: The attacker has admitted punching a woman's car when she attempted to get his details after he collided with her vehicle

The attacker has admitted punching a woman's car when she attempted to get his details after he collided with her vehicle He struck another car with a hammer, telling a woman he would find out where she lived

He struck another car with a hammer, telling a woman he would find out where she lived The 28-year-old set upon another car with a baseball bat, smashing mirrors and windows

Elten Gevergizyan, 28, pleaded guilty in the Melbourne Magistrates' Court to 15 offences including reckless conduct endangering serious injury, intentionally damaging property and intentionally destroying property.

The charges relate to three separate incidents in Melbourne's north over a three-day period in May this year.

In the first incident, Gevergizyan tailgated and sounded his horn at a woman as she drove north on the Tullamarine Freeway near Melbourne Airport on the afternoon of May 25.

An agreed summary released by the court said Gevergizyan overtook the woman's car with his truck on solid double lines and struck her vehicle, causing damage to the driver's side mirror.

When he did not stop to exchange details, the woman drove after Gevergizyan, who stuck his middle finger up at the woman as he drove around a roundabout.

When the woman continued to follow Gevergizyan, he eventually stopped, got out of his truck and ran towards the woman's car, punching it and causing a small dent before the woman drove off to report the incident to police.

Gevergizyan used a hammer to smash a car's mirror and window. ( Supplied: Melbourne Magistrates' Court )

'You're not calling the police'

The next day, Gevergizyan was driving a 5-tonne truck, towing a trailer with a 3-tonne excavator, when he deliberately collided with a vehicle carrying two women on the Tullamarine Freeway near Strathmore Heights.

Gevergizyan had earlier started tailgating the women's car and sounding his horn at them before moving into the lane to the left of their car and deliberately hitting their vehicle, causing damage to its rims, side mirror and door panels.

The summary said Gevergizyan forced the women's car into the safety barriers before ramming it once again.

When the women followed Gevergizyan in their vehicle and took a photo of his registration, he waved a stick out the window and made a cut-throat gesture at them before later pulling over.

After one of the women got out of the car to obtain Gevergizyan's details, he ran towards her, swinging a hammer at her.

Gevergizyan deliberately collided with the vehicle, which was carrying two women. ( Supplied: Melbourne Magistrates' Court )

When the other woman got out of the car and tried to run away, Gevergizyan chased her and pushed her over.

According to the summary, Gevergizyan stood over the woman, yelling: "Get back in the car or I'll take your rego and find out where you live" and "you're not calling the police".

When the women got back in the car, Gevergizyan hit the vehicle's side mirror and passenger side window with the hammer.

As the women tried to reverse the car, Gevergizyan struck one of the vehicle's rear passenger windows, smashing it and dropping the hammer inside the car.

Attacker carried baseball bat in van

In a third incident the following day, Gevergizyan pursued and tailgated a man and his wife after they sounded their horn at Gevergizyan when he suddenly pulled out in front of their car in a van on the Hume Highway, forcing them to brake heavily to avoid a collision.

After the couple drove ahead, Gevergizyan pulled alongside the man and his wife, signalling to them to pull over before intentionally side-swiping their vehicle and then accelerating away.

The man and his wife drove after Gevergizyan while in contact with a triple-zero operator.

When Gevergizyan exited the highway and pulled over on Cooper Street in Epping, the man stopped behind him with the intention of exchanging details.

But the summary said Gevergizyan took a baseball bat from his van and started hitting the couple's car with it, smashing the driver's side mirror and windows.

Gevergizyan's ex-partner then got out of the van and approached the passenger side of the car and opened the passenger door.

When the passenger shut the door, Gevergizyan went to the passenger side of the car and smashed the mirror and the window before returning to his van and driving off.

Gevergizyan did not apply for bail at Monday's hearing before Magistrate Charlie Rozencwajg.

He will return to court for a plea hearing in February.