Two motorcycle riders were seen throwing punches at each other during a road rage brawl on pavement.

The altercation allegedly erupted when one rider cut off the other in traffic, sparking a shouting match that quickly escalated in Bangkok, Thailand on September 1.

Footage shows the motorist in a dark blue jacket pinning his opponent to the ground while concerned onlookers rushed in to break up the scuffle.

He pressed his knees against the other rider to keep him from standing up until bystanders managed to pull them apart.

He can be heard shouting: ‘I already warned you.'

Golf Rachian, who pulled over his motorbike to help, said: ‘I was riding past when I noticed the fight. I made a turn and rode onto the pavement.

‘The smaller guy was just riding his bike normally, then out of nowhere the bigger guy in the blue shirt pulled up close to him and accused him of cutting him off.'

Despite the other motorist trying to avoid the argument, Golf said the other was aggressive.

He said: ‘He spoke to him politely and was saying he did not cut him off but the guy in blue shirt started to punch him.'

Both men eventually picked up their helmets and bikes before leaving the scene in different directions.