Authorities have slammed a man after video emerged of him ‘tram surfing’ in Sydney’s CBD.

As seen in the video above, the man appears to be sitting in between two carriages as the tram is stopped along George Street, near the Queen Victoria Building.

He stands in the same spot as the light rail begins to travel down the road.

The man doesn’t appear to get off the tram before the video ends.

A Transdev Sydney spokesperson, who said the man’s behaviour was “highly dangerous”, confirmed the incident occurred on Monday afternoon.

The man was caught riding between two carriages. Credit: 7NEWS/ Paul Johnstone“Transdev Sydney, the operator of the Sydney Light Rail network, is investigating the highly dangerous, illegal behaviour on board the tram,” the spokesperson told 7NEWS.com.au.

“There are warning signs on trams for a reason - tram surfing is very dangerous as a person could easily fall and suffer serious injuries or death.”

The spokesperson added authorities will be able to get a clear image of the ‘tram surfer’ once CCTV footage is downloaded.

A Transport for NSW spokesperson added the video should serve as a reminder for road users to play it safe around trams.

The man’s behaviour was slammed as being 'highly dangerous‘. Credit: 7NEWS/ Paul Johnstone“If you are using light rail you must be inside the tram,” the spokesperson said.

“We continue to see risky behavior around light rail vehicles.

“There are more people back in the CBD now restrictions are easing, so everyone needs to be extra careful around trams.

“We want to make sure everyone out on the roads gets where they need to be and back safely.”

NSW Police confirmed they were aware of the incident and are conducting inquiries.