Two drivers started brawling at the side of a motorway after a prang.
Footage shows one of the motorists, seen wearing black clothes, advancing on his rival in a white T-shirt.
He repeatedly points to his face, seemingly encouraging the other driver to throw the first punch.
READ MORE: Locals kayak through flooded street after raging storm
The man in black then throws a left hook and knocks his opponent’s phone out of his hand.
He teases: “You didn’t want your phone, right?”
The pair begin to scuffle and the man in white seems to take a ring off his finger before showing it to his rival.
The video ends with the man in white apparently punching the other driver in the face.
Witnesses said the police arrived promptly on the scene to break up the scrap.
The road-rage altercation was filmed on the Pan Island Expressway in Singapore last Fri (31 Jan).
One local said: “They fight like young girls.”
Another asked: “You call this fighting?”

“The guy in white was smart, he took off the ring so it wouldn’t be considered a weapon,” wrote someone else.
On 2 February, the Singapore Police Force confirmed that an accident took place on the expressway at around 4.45pm.
The prang involved a black Audi and a yellow Mitsubishi, as reported by Need To Know.
The police said a 48-year-old driver suffered minor injuries but refused medical attention.
A 39-year-old driver was arrested at the scene for drink-driving, the police stated.
He is also facing a charge of voluntarily causing hurt and is said to be assisting the police with their investigations.
READ MORE: Enraged man douses wife’s car in petrol before setting it on FIRE with four people inside