A MAN was struck and killed by a bus in Sydney overnight after stepping out of a Uber car which was stopped at a congested intersection.

It appears he was in a ride-share car that was stopped in Bathurst St, near George St, at 3.15am when he got out at a set of traffic lights and was hit by the bus travelling in a marked bus lane on his left.

The 30-year-old suffered appalling head injuries when he was dragged under the bus and apparently died instantly.

Traumatised witnesses had to be treated by paramedics.

Two friends of the victim were believed to have been in the car when the accident happened.

The devastated bus driver sat propped up against a wall nearby while he was treated for shock.

He was heard telling paramedics he just wanted “to go home”.

He was taken to hospital for mandatory testing, but was not physically injured.

A group of security guards who saw the early-morning accident stood huddled together, giving statements and being checked by paramedics.

One of the deeply affected guards doubled over and dry-retched into a garbage bin while a paramedic comforted him.

She had to hold the burly guard up at one point as his legs buckled.

A distressed male witness sat hunched on the wall of Hyde Park helping police, while another man sat glassy-eyed in the stairwell of a parked bus across the road.

Partygoers, heading home from city nightspots, stopped, horrified at the sight of the victim’s body, covered in a bloodied sheet, laying in the road.

“We didn’t see what happened. We saw what was left afterwards,” one of them said.

“It’s so sad. Such a terrible way to die,” another onlooker said.

Sydney City Police ­Inspector Kerrie Brill said officers had not yet been able to contact the man’s family, who were believed to be overseas.

Inspector Brill said police were still working to determine what exactly happened or whether ­alcohol was a factor.

“It is still part of the ­investigation to determine whether it was a red light or green light at this stage,” she said.

“Matters like this do have a large impact on everyone involved, ranging from the drivers to witnesses, and police and emergency services.”