Motorists in Perth’s south-east were left stunned when two drivers began fighting each other in heavy traffic.

In footage shared with 7NEWS, the driver of a blue Holden Commodore and the driver of a light-coloured Honda are seen slugging it out in front of horrified onlookers.

Neymar Naseri and his brother were waiting at the traffic lights on Albany Highway in Maddington when the fight started on Saturday.

“They were just punching and punching, uppercuts and everything,” Mr Naseri said.

“I saw them jumping out of their cars and all of a sudden, they were just throwing fists.”

Camera Icon Motorists in Perth’s south-east were left stunned when two drivers began fighting each other in heavy traffic. Credit: 7NEWS

A woman was seen trying to break up the fight before the men eventually returned to their vehicles.

“There was another guy that came into help and we got there as he came into help and we pulled them off each other,” Mr Naseri said.

Witnesses say they don’t know what sparked the fight, with neither vehicle involved in an accident beforehand.

The two vehicles were last seen driving towards Gosnells.